80000999972 has 12 divisors (see below), whose sum is σ = 140019922560. Its totient is φ = 39995307816.

The previous prime is 80000999971. The next prime is 80000999977. The reversal of 80000999972 is 27999900008.

It is not an unprimeable number, because it can be changed into a prime (80000999971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263272 + ... + 1325087.

It is an arithmetic number, because the mean of its divisors is an integer number (11668326880).

Almost surely, 2^80000999972 is an apocalyptic number.

It is an amenable number.

80000999972 is a deficient number, since it is larger than the sum of its proper divisors (60018922588).

80000999972 is a wasteful number, since it uses less digits than its factorization.

80000999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596090 (or 2596088 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 80000999972 in words is "eighty billion, nine hundred ninety-nine thousand, nine hundred seventy-two".