91612851 has 48 divisors (see below), whose sum is σ = 145555200. Its totient is φ = 51036480.

The previous prime is 91612837. The next prime is 91612853. The reversal of 91612851 is 15821619.

It is not a de Polignac number, because 91612851 - 2²² = 87418547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (91612853) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 255010 + ... + 255368.

It is an arithmetic number, because the mean of its divisors is an integer number (3032400).

Almost surely, 2^91612851 is an apocalyptic number.

91612851 is a deficient number, since it is larger than the sum of its proper divisors (53942349).

91612851 is a wasteful number, since it uses less digits than its factorization.

91612851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 429 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 91612851 is about 9571.4602334231. The cubic root of 91612851 is about 450.8016180844.

The spelling of 91612851 in words is "ninety-one million, six hundred twelve thousand, eight hundred fifty-one".