91866322386 has 48 divisors (see below), whose sum is σ = 209177352384. Its totient is φ = 29101578912.

The previous prime is 91866322357. The next prime is 91866322393. The reversal of 91866322386 is 68322366819.

91866322386 is a `hidden beast` number, since 9 + 186 + 63 + 22 + 386 = 666.

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 23 ways as a sum of consecutive naturals, for example, 1575286 + ... + 1632561.

It is an arithmetic number, because the mean of its divisors is an integer number (4357861508).

Almost surely, 2^91866322386 is an apocalyptic number.

91866322386 is an abundant number, since it is smaller than the sum of its proper divisors (117311029998).

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

91866322386 is a wasteful number, since it uses less digits than its factorization.

91866322386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207935 (or 3207932 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 91866322386 in words is "ninety-one billion, eight hundred sixty-six million, three hundred twenty-two thousand, three hundred eighty-six".