80997884928 has 110 divisors (see below), whose sum is σ = 241875767606. Its totient is φ = 26999267328.

The previous prime is 80997884921. The next prime is 80997884941. The reversal of 80997884928 is 82948879908.

It can be written as a sum of positive squares in only one way, i.e., 80311025664 + 686859264 = 283392^2 + 26208^2 .

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

It is not an unprimeable number, because it can be changed into a prime (80997884921) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 405325 + ... + 571212.

Almost surely, 2^80997884928 is an apocalyptic number.

It is an amenable number.

80997884928 is an abundant number, since it is smaller than the sum of its proper divisors (160877882678).

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

80997884928 is an equidigital number, since it uses as much as digits as its factorization.

80997884928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976569 (or 976542 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 72.

The spelling of 80997884928 in words is "eighty billion, nine hundred ninety-seven million, eight hundred eighty-four thousand, nine hundred twenty-eight".