81075580360 has 64 divisors (see below), whose sum is σ = 183976531200. Its totient is φ = 32153971200.

The previous prime is 81075580349. The next prime is 81075580429. The reversal of 81075580360 is 6308557018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6444156 + ... + 6456724.

It is an arithmetic number, because the mean of its divisors is an integer number (2874633300).

Almost surely, 2^81075580360 is an apocalyptic number.

It is an amenable number.

81075580360 is an abundant number, since it is smaller than the sum of its proper divisors (102900950840).

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

81075580360 is a wasteful number, since it uses less digits than its factorization.

81075580360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13942 (or 13938 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 81075580360 in words is "eighty-one billion, seventy-five million, five hundred eighty thousand, three hundred sixty".