91644895001 has 16 divisors (see below), whose sum is σ = 102119270400. Its totient is φ = 81528241680.

The previous prime is 91644894989. The next prime is 91644895003. The reversal of 91644895001 is 10059844619.

It is a de Polignac number, because none of the positive numbers 2^k-91644895001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91644895003) 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, 5289050 + ... + 5306348.

It is an arithmetic number, because the mean of its divisors is an integer number (6382454400).

Almost surely, 2^91644895001 is an apocalyptic number.

It is an amenable number.

91644895001 is a deficient number, since it is larger than the sum of its proper divisors (10474375399).

91644895001 is a wasteful number, since it uses less digits than its factorization.

91644895001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27604.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 91644895001 in words is "ninety-one billion, six hundred forty-four million, eight hundred ninety-five thousand, one".