8664402500 has 180 divisors, whose sum is σ = 21199342164. Its totient is φ = 3079104000.

The previous prime is 8664402497. The next prime is 8664402557. The reversal of 8664402500 is 52044668.

It can be written as a sum of positive squares in 30 ways, for example, as 4828582144 + 3835820356 = 69488^2 + 61934^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 27332342 + ... + 27332658.

Almost surely, 2^8664402500 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 8664402500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10599671082).

8664402500 is an abundant number, since it is smaller than the sum of its proper divisors (12534939664).

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

8664402500 is a wasteful number, since it uses less digits than its factorization.

8664402500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 8664402500 is about 93082.7723050834. The cubic root of 8664402500 is about 2053.9011575327.

The spelling of 8664402500 in words is "eight billion, six hundred sixty-four million, four hundred two thousand, five hundred".