91761504864 has 96 divisors (see below), whose sum is σ = 255364494336. Its totient is φ = 28800437760.

The previous prime is 91761504847. The next prime is 91761504899. The reversal of 91761504864 is 46840516719.

It is a tau number, because it is divible by the number of its divisors (96).

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, 306562 + ... + 526785.

It is an arithmetic number, because the mean of its divisors is an integer number (2660046816).

Almost surely, 2^91761504864 is an apocalyptic number.

It is an amenable number.

91761504864 is an abundant number, since it is smaller than the sum of its proper divisors (163602989472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91761504864 is a wasteful number, since it uses less digits than its factorization.

91761504864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833428 (or 833420 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 91761504864 in words is "ninety-one billion, seven hundred sixty-one million, five hundred four thousand, eight hundred sixty-four".