91330965940 has 24 divisors (see below), whose sum is σ = 192866516640. Its totient is φ = 36328293408.

The previous prime is 91330965881. The next prime is 91330966003. The reversal of 91330965940 is 4956903319.

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

It is a congruent number.

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, 12752142 + ... + 12759301.

It is an arithmetic number, because the mean of its divisors is an integer number (8036104860).

Almost surely, 2^91330965940 is an apocalyptic number.

It is an amenable number.

91330965940 is an abundant number, since it is smaller than the sum of its proper divisors (101535550700).

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

91330965940 is a wasteful number, since it uses less digits than its factorization.

91330965940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25511631 (or 25511629 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 91330965940 in words is "ninety-one billion, three hundred thirty million, nine hundred sixty-five thousand, nine hundred forty".