91022863986 has 24 divisors (see below), whose sum is σ = 197265628560. Its totient is φ = 30333351096.

The previous prime is 91022863957. The next prime is 91022864011. The reversal of 91022863986 is 68936822019.

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, 559576 + ... + 703683.

It is an arithmetic number, because the mean of its divisors is an integer number (8219401190).

Almost surely, 2^91022863986 is an apocalyptic number.

91022863986 is an abundant number, since it is smaller than the sum of its proper divisors (106242764574).

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

91022863986 is a wasteful number, since it uses less digits than its factorization.

91022863986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267270 (or 1267267 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 91022863986 in words is "ninety-one billion, twenty-two million, eight hundred sixty-three thousand, nine hundred eighty-six".