16523155968 has 120 divisors (see below), whose sum is σ = 48384757344. Its totient is φ = 5006960640.

The previous prime is 16523155939. The next prime is 16523155981. The reversal of 16523155968 is 86955132561.

It is a self number, because there is not a number n which added to its sum of digits gives 16523155968.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141405 + ... + 230307.

Almost surely, 2^16523155968 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 16523155968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24192378672).

16523155968 is an abundant number, since it is smaller than the sum of its proper divisors (31861601376).

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

16523155968 is an equidigital number, since it uses as much as digits as its factorization.

16523155968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88946 (or 88919 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 51.

The spelling of 16523155968 in words is "sixteen billion, five hundred twenty-three million, one hundred fifty-five thousand, nine hundred sixty-eight".