81112583958 has 16 divisors (see below), whose sum is σ = 185400192000. Its totient is φ = 23175023976.

The previous prime is 81112583953. The next prime is 81112583999. The reversal of 81112583958 is 85938521118.

It is a self number, because there is not a number n which added to its sum of digits gives 81112583958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81112583953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965625958 + ... + 965626041.

It is an arithmetic number, because the mean of its divisors is an integer number (11587512000).

Almost surely, 2^81112583958 is an apocalyptic number.

81112583958 is an abundant number, since it is smaller than the sum of its proper divisors (104287608042).

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

81112583958 is a wasteful number, since it uses less digits than its factorization.

81112583958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931252011.

The product of its digits is 691200, while the sum is 51.

The spelling of 81112583958 in words is "eighty-one billion, one hundred twelve million, five hundred eighty-three thousand, nine hundred fifty-eight".