16440355264 has 56 divisors (see below), whose sum is σ = 34399728000. Its totient is φ = 7774191360.

The previous prime is 16440355259. The next prime is 16440355313. The reversal of 16440355264 is 46255304461.

It is a super-3 number, since 3×16440355264³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 717099 + ... + 739669.

Almost surely, 2^16440355264 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 16440355264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17199864000).

16440355264 is an abundant number, since it is smaller than the sum of its proper divisors (17959372736).

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

16440355264 is a wasteful number, since it uses less digits than its factorization.

16440355264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23201 (or 23191 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 16440355264 in words is "sixteen billion, four hundred forty million, three hundred fifty-five thousand, two hundred sixty-four".