12639587904 has 42 divisors (see below), whose sum is σ = 36229098230. Its totient is φ = 4213195776.

The previous prime is 12639587897. The next prime is 12639587927. The reversal of 12639587904 is 40978593621.

12639587904 is a `hidden beast` number, since 1 + 26 + 39 + 587 + 9 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11431886400 + 1207701504 = 106920^2 + 34752^2 .

It is a super-2 number, since 2×12639587904² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10971289 + ... + 10972440.

It is a 1-persistent number, because it is pandigital, but 2⋅12639587904 = 25279175808 is not.

Almost surely, 2^12639587904 is an apocalyptic number.

It is an amenable number.

12639587904 is an abundant number, since it is smaller than the sum of its proper divisors (23589510326).

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

12639587904 is a wasteful number, since it uses less digits than its factorization.

12639587904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21943747 (or 21943734 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 12639587904 in words is "twelve billion, six hundred thirty-nine million, five hundred eighty-seven thousand, nine hundred four".