15925151664 has 80 divisors (see below), whose sum is σ = 45755404800. Its totient is φ = 5303237184.

The previous prime is 15925151647. The next prime is 15925151687. The reversal of 15925151664 is 46615152951.

15925151664 is a `hidden beast` number, since 1 + 59 + 25 + 1 + 516 + 64 = 666.

It is a super-2 number, since 2×15925151664² (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 15 ways as a sum of consecutive naturals, for example, 441877 + ... + 476555.

It is an arithmetic number, because the mean of its divisors is an integer number (571942560).

Almost surely, 2^15925151664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15925151664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22877702400).

15925151664 is an abundant number, since it is smaller than the sum of its proper divisors (29830253136).

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

15925151664 is a wasteful number, since it uses less digits than its factorization.

15925151664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35759 (or 35747 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 15925151664 in words is "fifteen billion, nine hundred twenty-five million, one hundred fifty-one thousand, six hundred sixty-four".