81179630958 has 32 divisors (see below), whose sum is σ = 163607633280. Its totient is φ = 26852006880.

The previous prime is 81179630929. The next prime is 81179630993. The reversal of 81179630958 is 85903697118.

It is a junction number, because it is equal to n+sod(n) for n = 81179630898 and 81179630907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754416 + ... + 1800092.

It is an arithmetic number, because the mean of its divisors is an integer number (5112738540).

Almost surely, 2^81179630958 is an apocalyptic number.

81179630958 is an abundant number, since it is smaller than the sum of its proper divisors (82428002322).

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

81179630958 is a wasteful number, since it uses less digits than its factorization.

81179630958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47952.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 81179630958 in words is "eighty-one billion, one hundred seventy-nine million, six hundred thirty thousand, nine hundred fifty-eight".