91151826255 has 32 divisors (see below), whose sum is σ = 185197363200. Its totient is φ = 41669405856.

The previous prime is 91151826251. The next prime is 91151826299. The reversal of 91151826255 is 55262815119.

91151826255 is a `hidden beast` number, since 9 + 1 + 1 + 5 + 18 + 2 + 625 + 5 = 666.

It is not a de Polignac number, because 91151826255 - 2² = 91151826251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91151826255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91151826251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48227535 + ... + 48229424.

It is an arithmetic number, because the mean of its divisors is an integer number (5787417600).

Almost surely, 2^91151826255 is an apocalyptic number.

91151826255 is an abundant number, since it is smaller than the sum of its proper divisors (94045536945).

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

91151826255 is a wasteful number, since it uses less digits than its factorization.

91151826255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96456980 (or 96456974 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The spelling of 91151826255 in words is "ninety-one billion, one hundred fifty-one million, eight hundred twenty-six thousand, two hundred fifty-five".