499438907640 has 80 divisors (see below), whose sum is σ = 1678669672680. Its totient is φ = 133183707840.

The previous prime is 499438907609. The next prime is 499438907657. The reversal of 499438907640 is 46709834994.

499438907640 is a `hidden beast` number, since 4 + 9 + 9 + 438 + 90 + 76 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77070666 + ... + 77077145.

Almost surely, 2^499438907640 is an apocalyptic number.

499438907640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499438907640 is an abundant number, since it is smaller than the sum of its proper divisors (1179230765040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

499438907640 is a wasteful number, since it uses less digits than its factorization.

499438907640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154147834 (or 154147821 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 499438907640 in words is "four hundred ninety-nine billion, four hundred thirty-eight million, nine hundred seven thousand, six hundred forty".