91316138892 has 48 divisors (see below), whose sum is σ = 232970707200. Its totient is φ = 27608506560.

The previous prime is 91316138873. The next prime is 91316138917. The reversal of 91316138892 is 29883161319.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729967 + ... + 845862.

It is an arithmetic number, because the mean of its divisors is an integer number (4853556400).

Almost surely, 2^91316138892 is an apocalyptic number.

It is an amenable number.

91316138892 is an abundant number, since it is smaller than the sum of its proper divisors (141654568308).

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

91316138892 is a wasteful number, since it uses less digits than its factorization.

91316138892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576286 (or 1576284 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

It can be divided in two parts, 913161388 and 92, that added together give a triangular number (913161480 = T₄₂₇₃₅).

The spelling of 91316138892 in words is "ninety-one billion, three hundred sixteen million, one hundred thirty-eight thousand, eight hundred ninety-two".