91956510863 has 12 divisors (see below), whose sum is σ = 108435162960. Its totient is φ = 77740139232.

The previous prime is 91956510817. The next prime is 91956510869. The reversal of 91956510863 is 36801565919.

It is not a de Polignac number, because 91956510863 - 2¹² = 91956506767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91956510869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12850283 + ... + 12857436.

It is an arithmetic number, because the mean of its divisors is an integer number (9036263580).

Almost surely, 2^91956510863 is an apocalyptic number.

91956510863 is a deficient number, since it is larger than the sum of its proper divisors (16478652097).

91956510863 is a wasteful number, since it uses less digits than its factorization.

91956510863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25707806 (or 25707799 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 91956510863 in words is "ninety-one billion, nine hundred fifty-six million, five hundred ten thousand, eight hundred sixty-three".