91507375868 has 12 divisors (see below), whose sum is σ = 163545097632. Its totient is φ = 44780205120.

The previous prime is 91507375867. The next prime is 91507375879. The reversal of 91507375868 is 86857370519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91507375867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243370493 + ... + 243370868.

It is an arithmetic number, because the mean of its divisors is an integer number (13628758136).

Almost surely, 2^91507375868 is an apocalyptic number.

It is an amenable number.

91507375868 is a deficient number, since it is larger than the sum of its proper divisors (72037721764).

91507375868 is a wasteful number, since it uses less digits than its factorization.

91507375868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486741412 (or 486741410 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 59.

The spelling of 91507375868 in words is "ninety-one billion, five hundred seven million, three hundred seventy-five thousand, eight hundred sixty-eight".