91386682820 has 24 divisors (see below), whose sum is σ = 193182980928. Its totient is φ = 36312588000.

The previous prime is 91386682819. The next prime is 91386682843. The reversal of 91386682820 is 2828668319.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15127226 + ... + 15133265.

It is an arithmetic number, because the mean of its divisors is an integer number (8049290872).

Almost surely, 2^91386682820 is an apocalyptic number.

It is an amenable number.

91386682820 is an abundant number, since it is smaller than the sum of its proper divisors (101796298108).

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

91386682820 is a wasteful number, since it uses less digits than its factorization.

91386682820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30260651 (or 30260649 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 91386682820 in words is "ninety-one billion, three hundred eighty-six million, six hundred eighty-two thousand, eight hundred twenty".