8999764992 has 66 divisors (see below), whose sum is σ = 25986652718. Its totient is φ = 2999918592.

The previous prime is 8999764987. The next prime is 8999765003. The reversal of 8999764992 is 2994679998.

It can be written as a sum of positive squares in only one way, i.e., 8923447296 + 76317696 = 94464^2 + 8736^2 .

It is a super-2 number, since 2×8999764992² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 8999764992.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 479053 + ... + 497484.

Almost surely, 2^8999764992 is an apocalyptic number.

It is an amenable number.

8999764992 is an abundant number, since it is smaller than the sum of its proper divisors (16986887726).

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

8999764992 is a wasteful number, since it uses less digits than its factorization.

8999764992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976563 (or 976542 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 72.

The square root of 8999764992 is about 94867.0911960518. The cubic root of 8999764992 is about 2080.0657178447.

The spelling of 8999764992 in words is "eight billion, nine hundred ninety-nine million, seven hundred sixty-four thousand, nine hundred ninety-two".