91371262864 has 40 divisors (see below), whose sum is σ = 205341831488. Its totient is φ = 38574645120.

The previous prime is 91371262861. The next prime is 91371262891. The reversal of 91371262864 is 46826217319.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91371262861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6080667 + ... + 6095674.

Almost surely, 2^91371262864 is an apocalyptic number.

It is an amenable number.

91371262864 is an abundant number, since it is smaller than the sum of its proper divisors (113970568624).

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

91371262864 is a wasteful number, since it uses less digits than its factorization.

91371262864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12176423 (or 12176417 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The spelling of 91371262864 in words is "ninety-one billion, three hundred seventy-one million, two hundred sixty-two thousand, eight hundred sixty-four".