81113400044 has 12 divisors (see below), whose sum is σ = 142059096984. Its totient is φ = 40525086624.

The previous prime is 81113399999. The next prime is 81113400097. The reversal of 81113400044 is 44000431118.

It is a junction number, because it is equal to n+sod(n) for n = 81113399986 and 81113400022.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7897577 + ... + 7907840.

It is an arithmetic number, because the mean of its divisors is an integer number (11838258082).

Almost surely, 2^81113400044 is an apocalyptic number.

It is an amenable number.

81113400044 is a deficient number, since it is larger than the sum of its proper divisors (60945696940).

81113400044 is a wasteful number, since it uses less digits than its factorization.

81113400044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806704 (or 15806702 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 81113400044 in words is "eighty-one billion, one hundred thirteen million, four hundred thousand, forty-four".