81167115270 has 16 divisors (see below), whose sum is σ = 194801076720. Its totient is φ = 21644564064.

The previous prime is 81167115223. The next prime is 81167115343. The reversal of 81167115270 is 7251176118.

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, 1352785225 + ... + 1352785284.

It is an arithmetic number, because the mean of its divisors is an integer number (12175067295).

Almost surely, 2^81167115270 is an apocalyptic number.

81167115270 is an abundant number, since it is smaller than the sum of its proper divisors (113633961450).

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

81167115270 is a wasteful number, since it uses less digits than its factorization.

81167115270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705570519.

The product of its (nonzero) digits is 23520, while the sum is 39.

The spelling of 81167115270 in words is "eighty-one billion, one hundred sixty-seven million, one hundred fifteen thousand, two hundred seventy".