91485947904 has 192 divisors, whose sum is σ = 263464830720. Its totient is φ = 28063825920.

The previous prime is 91485947887. The next prime is 91485947947. The reversal of 91485947904 is 40974958419.

It is a tau number, because it is divible by the number of its divisors (192).

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, 29311464 + ... + 29314584.

It is an arithmetic number, because the mean of its divisors is an integer number (1372212660).

Almost surely, 2^91485947904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91485947904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131732415360).

91485947904 is an abundant number, since it is smaller than the sum of its proper divisors (171978882816).

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

91485947904 is a wasteful number, since it uses less digits than its factorization.

91485947904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 91485947904 in words is "ninety-one billion, four hundred eighty-five million, nine hundred forty-seven thousand, nine hundred four".