91951644701 has 16 divisors (see below), whose sum is σ = 108762547200. Its totient is φ = 76062043008.

The previous prime is 91951644661. The next prime is 91951644721. The reversal of 91951644701 is 10744615919.

It is a de Polignac number, because none of the positive numbers 2^k-91951644701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91951644721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329345 + ... + 540713.

It is an arithmetic number, because the mean of its divisors is an integer number (6797659200).

Almost surely, 2^91951644701 is an apocalyptic number.

It is an amenable number.

91951644701 is a deficient number, since it is larger than the sum of its proper divisors (16810902499).

91951644701 is a wasteful number, since it uses less digits than its factorization.

91951644701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213548.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 91951644701 in words is "ninety-one billion, nine hundred fifty-one million, six hundred forty-four thousand, seven hundred one".