/**
 * A number that may contain greater precision than can safely be stored in
 * JavaScript's `number` data type. Numerical values are represented internally
 * as strings (the format used by DynamoDB's JSON-based data representation
 * schema).
 */
export declare class NumberValue {
    readonly value: string;
    readonly [Symbol.toStringTag] = "DynamoDbNumberValue";
    constructor(value: string | number);
    /**
     * Convert the value to its desired JSON representation. Called by
     * `JSON.stringify`.
     */
    toJSON(): number;
    /**
     * Convert the value to its desired string representation. Called
     * automatically when objects are coerced into strings.
     */
    toString(): string;
    /**
     * Convert the value to its desired literal representation. Called
     * automatically when objects appear in arithmetic expressions.
     */
    valueOf(): number;
    /**
     * Evaluate whether the provided value is a NumberValue object.
     */
    static isNumberValue(arg: any): arg is NumberValue;
}