16331865264 has 450 divisors, whose sum is σ = 57009287556. Its totient is φ = 4327914240.

The previous prime is 16331865247. The next prime is 16331865271. The reversal of 16331865264 is 46256813361.

16331865264 is a `hidden beast` number, since 1 + 633 + 1 + 8 + 6 + 5 + 2 + 6 + 4 = 666.

Its product of digits (622080) is a multiple of the sum of its prime divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 859571847 + ... + 859571865.

Almost surely, 2^16331865264 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 16331865264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28504643778).

16331865264 is an abundant number, since it is smaller than the sum of its proper divisors (40677422292).

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

16331865264 is a wasteful number, since it uses less digits than its factorization.

16331865264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 48 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 16331865264 in words is "sixteen billion, three hundred thirty-one million, eight hundred sixty-five thousand, two hundred sixty-four".