15664636004 has 12 divisors (see below), whose sum is σ = 27461294700. Its totient is φ = 7818551808.

The previous prime is 15664635983. The next prime is 15664636019. The reversal of 15664636004 is 40063646651.

15664636004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2464923904 + 13199712100 = 49648^2 + 114890^2 .

It is a super-2 number, since 2×15664636004² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3438989 + ... + 3443540.

It is an arithmetic number, because the mean of its divisors is an integer number (2288441225).

Almost surely, 2^15664636004 is an apocalyptic number.

It is an amenable number.

15664636004 is a deficient number, since it is larger than the sum of its proper divisors (11796658696).

15664636004 is a wasteful number, since it uses less digits than its factorization.

15664636004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6883102 (or 6883100 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 15664636004 in words is "fifteen billion, six hundred sixty-four million, six hundred thirty-six thousand, four".