499438907639 has 16 divisors (see below), whose sum is σ = 584284409856. Its totient is φ = 418009948800.

The previous prime is 499438907609. The next prime is 499438907657. The reversal of 499438907639 is 936709834994.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499438907639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499438907609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1619282 + ... + 1902879.

It is an arithmetic number, because the mean of its divisors is an integer number (36517775616).

Almost surely, 2^499438907639 is an apocalyptic number.

499438907639 is a deficient number, since it is larger than the sum of its proper divisors (84845502217).

499438907639 is a wasteful number, since it uses less digits than its factorization.

499438907639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522646.

The product of its (nonzero) digits is 317447424, while the sum is 71.

The spelling of 499438907639 in words is "four hundred ninety-nine billion, four hundred thirty-eight million, nine hundred seven thousand, six hundred thirty-nine".