16525517568 has 72 divisors (see below), whose sum is σ = 50265132288. Its totient is φ = 4721574912.

The previous prime is 16525517531. The next prime is 16525517581. The reversal of 16525517568 is 86571552561.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16525517568.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531596 + ... + 1542347.

Almost surely, 2^16525517568 is an apocalyptic number.

It is an amenable number.

16525517568 is an abundant number, since it is smaller than the sum of its proper divisors (33739614720).

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

16525517568 is an equidigital number, since it uses as much as digits as its factorization.

16525517568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073969 (or 3073955 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 51.

The spelling of 16525517568 in words is "sixteen billion, five hundred twenty-five million, five hundred seventeen thousand, five hundred sixty-eight".