81113513360 has 80 divisors (see below), whose sum is σ = 205788382272. Its totient is φ = 29487936000.

The previous prime is 81113513353. The next prime is 81113513389. The reversal of 81113513360 is 6331531118.

It is a tau number, because it is divible by the number of its divisors (80).

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, 4035335 + ... + 4055385.

Almost surely, 2^81113513360 is an apocalyptic number.

81113513360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81113513360 is an abundant number, since it is smaller than the sum of its proper divisors (124674868912).

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

81113513360 is a wasteful number, since it uses less digits than its factorization.

81113513360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24672 (or 24666 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 81113513360 in words is "eighty-one billion, one hundred thirteen million, five hundred thirteen thousand, three hundred sixty".