81286857162 has 24 divisors (see below), whose sum is σ = 201281741856. Its totient is φ = 23224816296.

The previous prime is 81286857151. The next prime is 81286857181. The reversal of 81286857162 is 26175868218.

81286857162 is a `hidden beast` number, since 8 + 1 + 2 + 8 + 6 + 8 + 571 + 62 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 81286857099 and 81286857108.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322566768 + ... + 322567019.

It is an arithmetic number, because the mean of its divisors is an integer number (8386739244).

Almost surely, 2^81286857162 is an apocalyptic number.

81286857162 is an abundant number, since it is smaller than the sum of its proper divisors (119994884694).

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

81286857162 is a wasteful number, since it uses less digits than its factorization.

81286857162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645133802 (or 645133799 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 81286857162 in words is "eighty-one billion, two hundred eighty-six million, eight hundred fifty-seven thousand, one hundred sixty-two".