81522834255 has 12 divisors (see below), whose sum is σ = 141306246120. Its totient is φ = 43478844912.

The previous prime is 81522834247. The next prime is 81522834301. The reversal of 81522834255 is 55243822518.

81522834255 is a `hidden beast` number, since 8 + 1 + 522 + 83 + 42 + 5 + 5 = 666.

It is not a de Polignac number, because 81522834255 - 2³ = 81522834247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1811618539 = 81522834255 / (8 + 1 + 5 + 2 + 2 + 8 + 3 + 4 + 2 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 81522834255.

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 11 ways as a sum of consecutive naturals, for example, 905809225 + ... + 905809314.

It is an arithmetic number, because the mean of its divisors is an integer number (11775520510).

Almost surely, 2^81522834255 is an apocalyptic number.

81522834255 is a deficient number, since it is larger than the sum of its proper divisors (59783411865).

81522834255 is a wasteful number, since it uses less digits than its factorization.

81522834255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811618550 (or 1811618547 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The spelling of 81522834255 in words is "eighty-one billion, five hundred twenty-two million, eight hundred thirty-four thousand, two hundred fifty-five".