81073592880 has 160 divisors (see below), whose sum is σ = 293094336000. Its totient is φ = 18531088128.

The previous prime is 81073592879. The next prime is 81073592891. The reversal of 81073592880 is 8829537018.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410110 + ... + 574749.

It is an arithmetic number, because the mean of its divisors is an integer number (1831839600).

Almost surely, 2^81073592880 is an apocalyptic number.

81073592880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81073592880 is an abundant number, since it is smaller than the sum of its proper divisors (212020743120).

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

81073592880 is a wasteful number, since it uses less digits than its factorization.

81073592880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984896 (or 984876 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 81073592880 in words is "eighty-one billion, seventy-three million, five hundred ninety-two thousand, eight hundred eighty".