91775974112 has 48 divisors (see below), whose sum is σ = 188736210432. Its totient is φ = 43847126400.

The previous prime is 91775974099. The next prime is 91775974139. The reversal of 91775974112 is 21147957719.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647237 + ... + 776187.

It is an arithmetic number, because the mean of its divisors is an integer number (3932004384).

Almost surely, 2^91775974112 is an apocalyptic number.

91775974112 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91775974112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94368105216).

91775974112 is an abundant number, since it is smaller than the sum of its proper divisors (96960236320).

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

91775974112 is a wasteful number, since it uses less digits than its factorization.

91775974112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129951 (or 129943 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 53.

The spelling of 91775974112 in words is "ninety-one billion, seven hundred seventy-five million, nine hundred seventy-four thousand, one hundred twelve".