91280747904 has 64 divisors (see below), whose sum is σ = 242517240000. Its totient is φ = 30420296192.

The previous prime is 91280747897. The next prime is 91280747911. The reversal of 91280747904 is 40974708219.

It is an interprime number because it is at equal distance from previous prime (91280747897) and next prime (91280747911).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934707 + ... + 1981325.

It is an arithmetic number, because the mean of its divisors is an integer number (3789331875).

Almost surely, 2^91280747904 is an apocalyptic number.

It is an amenable number.

91280747904 is an abundant number, since it is smaller than the sum of its proper divisors (151236492096).

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

91280747904 is a wasteful number, since it uses less digits than its factorization.

91280747904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51735 (or 51723 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 91280747904 in words is "ninety-one billion, two hundred eighty million, seven hundred forty-seven thousand, nine hundred four".