91559563312 has 40 divisors (see below), whose sum is σ = 202770521856. Its totient is φ = 39233718336.

The previous prime is 91559563307. The next prime is 91559563357. The reversal of 91559563312 is 21336595519.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701853 + ... + 822019.

Almost surely, 2^91559563312 is an apocalyptic number.

It is an amenable number.

91559563312 is an abundant number, since it is smaller than the sum of its proper divisors (111210958544).

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

91559563312 is a wasteful number, since it uses less digits than its factorization.

91559563312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126985 (or 126979 counting only the distinct ones).

The product of its digits is 1093500, while the sum is 49.

The spelling of 91559563312 in words is "ninety-one billion, five hundred fifty-nine million, five hundred sixty-three thousand, three hundred twelve".