91317134655 has 48 divisors (see below), whose sum is σ = 162470655360. Its totient is φ = 47429409984.

The previous prime is 91317134653. The next prime is 91317134687. The reversal of 91317134655 is 55643171319.

91317134655 is a `hidden beast` number, since 9 + 13 + 171 + 3 + 465 + 5 = 666.

It is not a de Polignac number, because 91317134655 - 2¹ = 91317134653 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 91317134655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91317134653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123364 + ... + 444806.

It is an arithmetic number, because the mean of its divisors is an integer number (3384805320).

Almost surely, 2^91317134655 is an apocalyptic number.

91317134655 is a deficient number, since it is larger than the sum of its proper divisors (71153520705).

91317134655 is a wasteful number, since it uses less digits than its factorization.

91317134655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321620 (or 321617 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The spelling of 91317134655 in words is "ninety-one billion, three hundred seventeen million, one hundred thirty-four thousand, six hundred fifty-five".