91256929868 has 12 divisors (see below), whose sum is σ = 171984214080. Its totient is φ = 42118582992.

The previous prime is 91256929867. The next prime is 91256929877. The reversal of 91256929868 is 86892965219.

It is not an unprimeable number, because it can be changed into a prime (91256929867) 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, 877470428 + ... + 877470531.

It is an arithmetic number, because the mean of its divisors is an integer number (14332017840).

Almost surely, 2^91256929868 is an apocalyptic number.

It is an amenable number.

91256929868 is a deficient number, since it is larger than the sum of its proper divisors (80727284212).

91256929868 is a wasteful number, since it uses less digits than its factorization.

91256929868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754940976 (or 1754940974 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 65.

The spelling of 91256929868 in words is "ninety-one billion, two hundred fifty-six million, nine hundred twenty-nine thousand, eight hundred sixty-eight".