91355632256 has 64 divisors (see below), whose sum is σ = 209322343680. Its totient is φ = 38902975488.

The previous prime is 91355632243. The next prime is 91355632261. The reversal of 91355632256 is 65223655319.

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

It is a self number, because there is not a number n which added to its sum of digits gives 91355632256.

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, 184040 + ... + 465383.

It is an arithmetic number, because the mean of its divisors is an integer number (3270661620).

Almost surely, 2^91355632256 is an apocalyptic number.

It is an amenable number.

91355632256 is an abundant number, since it is smaller than the sum of its proper divisors (117966711424).

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

91355632256 is a wasteful number, since it uses less digits than its factorization.

91355632256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649601 (or 649589 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 47.

The spelling of 91355632256 in words is "ninety-one billion, three hundred fifty-five million, six hundred thirty-two thousand, two hundred fifty-six".