91957703886 has 12 divisors (see below), whose sum is σ = 199241691792. Its totient is φ = 30652567956.

The previous prime is 91957703843. The next prime is 91957703899. The reversal of 91957703886 is 68830775919.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2554380646 + ... + 2554380681.

It is an arithmetic number, because the mean of its divisors is an integer number (16603474316).

Almost surely, 2^91957703886 is an apocalyptic number.

91957703886 is an abundant number, since it is smaller than the sum of its proper divisors (107283987906).

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

91957703886 is a wasteful number, since it uses less digits than its factorization.

91957703886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108761335 (or 5108761332 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 91957703886 in words is "ninety-one billion, nine hundred fifty-seven million, seven hundred three thousand, eight hundred eighty-six".