8999559972 has 48 divisors (see below), whose sum is σ = 25126980480. Its totient is φ = 2769094944.

The previous prime is 8999559971. The next prime is 8999560013. The reversal of 8999559972 is 2799559998.

It is a self number, because there is not a number n which added to its sum of digits gives 8999559972.

It is not an unprimeable number, because it can be changed into a prime (8999559971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3203568 + ... + 3206375.

It is an arithmetic number, because the mean of its divisors is an integer number (523478760).

Almost surely, 2^8999559972 is an apocalyptic number.

It is an amenable number.

8999559972 is an abundant number, since it is smaller than the sum of its proper divisors (16127420508).

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

8999559972 is a wasteful number, since it uses less digits than its factorization.

8999559972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409969 (or 6409961 counting only the distinct ones).

The product of its digits is 165337200, while the sum is 72.

The square root of 8999559972 is about 94866.0106255133. The cubic root of 8999559972 is about 2080.0499226800.

The spelling of 8999559972 in words is "eight billion, nine hundred ninety-nine million, five hundred fifty-nine thousand, nine hundred seventy-two".