81059110102 has 16 divisors (see below), whose sum is σ = 123709198320. Its totient is φ = 39828298752.

The previous prime is 81059110091. The next prime is 81059110159. The reversal of 81059110102 is 20101195018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367883 + ... + 1425910.

It is an arithmetic number, because the mean of its divisors is an integer number (7731824895).

Almost surely, 2^81059110102 is an apocalyptic number.

81059110102 is a deficient number, since it is larger than the sum of its proper divisors (42650088218).

81059110102 is a wasteful number, since it uses less digits than its factorization.

81059110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794047.

The product of its (nonzero) digits is 720, while the sum is 28.

The spelling of 81059110102 in words is "eighty-one billion, fifty-nine million, one hundred ten thousand, one hundred two".