16328231568 has 120 divisors (see below), whose sum is σ = 49968337536. Its totient is φ = 4936262400.

The previous prime is 16328231561. The next prime is 16328231597. The reversal of 16328231568 is 86513282361.

16328231568 is a `hidden beast` number, since 1 + 6 + 3 + 2 + 82 + 3 + 1 + 568 = 666.

It is a super-2 number, since 2×16328231568² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16328231561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670746 + ... + 694662.

Almost surely, 2^16328231568 is an apocalyptic number.

16328231568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16328231568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24984168768).

16328231568 is an abundant number, since it is smaller than the sum of its proper divisors (33640105968).

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

16328231568 is a wasteful number, since it uses less digits than its factorization.

16328231568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24373 (or 24364 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 16328231568 in words is "sixteen billion, three hundred twenty-eight million, two hundred thirty-one thousand, five hundred sixty-eight".