81593738060 has 96 divisors (see below), whose sum is σ = 176394516480. Its totient is φ = 31688338688.

The previous prime is 81593738041. The next prime is 81593738063. The reversal of 81593738060 is 6083739518.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81593738063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83004329 + ... + 83005311.

It is an arithmetic number, because the mean of its divisors is an integer number (1837442880).

Almost surely, 2^81593738060 is an apocalyptic number.

It is an amenable number.

81593738060 is an abundant number, since it is smaller than the sum of its proper divisors (94800778420).

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

81593738060 is a wasteful number, since it uses less digits than its factorization.

81593738060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 81593738060 in words is "eighty-one billion, five hundred ninety-three million, seven hundred thirty-eight thousand, sixty".