15904253664 has 96 divisors (see below), whose sum is σ = 49955703840. Its totient is φ = 4893613056.

The previous prime is 15904253663. The next prime is 15904253669. The reversal of 15904253664 is 46635240951.

15904253664 is a `hidden beast` number, since 1 + 59 + 0 + 4 + 2 + 536 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15904253663) 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, 696757 + ... + 719220.

It is an arithmetic number, because the mean of its divisors is an integer number (520371915).

Almost surely, 2^15904253664 is an apocalyptic number.

It is an amenable number.

15904253664 is an abundant number, since it is smaller than the sum of its proper divisors (34051450176).

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

15904253664 is a wasteful number, since it uses less digits than its factorization.

15904253664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416009 (or 1415995 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 15904253664 in words is "fifteen billion, nine hundred four million, two hundred fifty-three thousand, six hundred sixty-four".