91878925512 has 32 divisors (see below), whose sum is σ = 250578888480. Its totient is φ = 27842098560.

The previous prime is 91878925487. The next prime is 91878925561. The reversal of 91878925512 is 21552987819.

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, 174012853 + ... + 174013380.

It is an arithmetic number, because the mean of its divisors is an integer number (7830590265).

Almost surely, 2^91878925512 is an apocalyptic number.

It is an amenable number.

91878925512 is an abundant number, since it is smaller than the sum of its proper divisors (158699962968).

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

91878925512 is a wasteful number, since it uses less digits than its factorization.

91878925512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348026253 (or 348026249 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 57.

The spelling of 91878925512 in words is "ninety-one billion, eight hundred seventy-eight million, nine hundred twenty-five thousand, five hundred twelve".