91759680885 has 16 divisors (see below), whose sum is σ = 147060604800. Its totient is φ = 48856791360.

The previous prime is 91759680869. The next prime is 91759680899. The reversal of 91759680885 is 58808695719.

It is a happy number.

It is not a de Polignac number, because 91759680885 - 2⁴ = 91759680869 is a prime.

It is a super-2 number, since 2×91759680885² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097286 + ... + 5115255.

It is an arithmetic number, because the mean of its divisors is an integer number (9191287800).

Almost surely, 2^91759680885 is an apocalyptic number.

It is an amenable number.

91759680885 is a deficient number, since it is larger than the sum of its proper divisors (55300923915).

91759680885 is a wasteful number, since it uses less digits than its factorization.

91759680885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10213148.

The product of its (nonzero) digits is 43545600, while the sum is 66.

The spelling of 91759680885 in words is "ninety-one billion, seven hundred fifty-nine million, six hundred eighty thousand, eight hundred eighty-five".