91401611964 has 96 divisors (see below), whose sum is σ = 243668705280. Its totient is φ = 26433485568.

The previous prime is 91401611947. The next prime is 91401611981. The reversal of 91401611964 is 46911610419.

It is an interprime number because it is at equal distance from previous prime (91401611947) and next prime (91401611981).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255022 + ... + 497834.

It is an arithmetic number, because the mean of its divisors is an integer number (2538215680).

Almost surely, 2^91401611964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91401611964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121834352640).

91401611964 is an abundant number, since it is smaller than the sum of its proper divisors (152267093316).

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

91401611964 is a wasteful number, since it uses less digits than its factorization.

91401611964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242979 (or 242977 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 91401611964 in words is "ninety-one billion, four hundred one million, six hundred eleven thousand, nine hundred sixty-four".