91126918568 has 48 divisors (see below), whose sum is σ = 198811768320. Its totient is φ = 39044019168.

The previous prime is 91126918559. The next prime is 91126918613. The reversal of 91126918568 is 86581962119.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1549721 + ... + 1607447.

It is an arithmetic number, because the mean of its divisors is an integer number (4141911840).

Almost surely, 2^91126918568 is an apocalyptic number.

91126918568 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

91126918568 is an abundant number, since it is smaller than the sum of its proper divisors (107684849752).

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

91126918568 is a wasteful number, since it uses less digits than its factorization.

91126918568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61774 (or 61763 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 56.

The spelling of 91126918568 in words is "ninety-one billion, one hundred twenty-six million, nine hundred eighteen thousand, five hundred sixty-eight".