81182556834 has 16 divisors (see below), whose sum is σ = 166141047072. Its totient is φ = 26431530048.

The previous prime is 81182556817. The next prime is 81182556841. The reversal of 81182556834 is 43865528118.

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, 157330279 + ... + 157330794.

It is an arithmetic number, because the mean of its divisors is an integer number (10383815442).

Almost surely, 2^81182556834 is an apocalyptic number.

81182556834 is an abundant number, since it is smaller than the sum of its proper divisors (84958490238).

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

81182556834 is a wasteful number, since it uses less digits than its factorization.

81182556834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314661121.

The product of its digits is 1843200, while the sum is 51.

The spelling of 81182556834 in words is "eighty-one billion, one hundred eighty-two million, five hundred fifty-six thousand, eight hundred thirty-four".