91165655 has 8 divisors (see below), whose sum is σ = 125027232. Its totient is φ = 62513568.

The previous prime is 91165649. The next prime is 91165687. The reversal of 91165655 is 55656119.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91165655 - 2⁴ = 91165639 is a prime.

It is a super-2 number, since 2×91165655² = 16622353303158050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302332 + ... + 1302401.

It is an arithmetic number, because the mean of its divisors is an integer number (15628404).

Almost surely, 2^91165655 is an apocalyptic number.

91165655 is a deficient number, since it is larger than the sum of its proper divisors (33861577).

91165655 is a wasteful number, since it uses less digits than its factorization.

91165655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604745.

The product of its digits is 40500, while the sum is 38.

The square root of 91165655 is about 9548.0707475385. The cubic root of 91165655 is about 450.0669118609.

It can be divided in two parts, 911 and 65655, that added together give a palindrome (66566).

The spelling of 91165655 in words is "ninety-one million, one hundred sixty-five thousand, six hundred fifty-five".