91820084664 has 128 divisors (see below), whose sum is σ = 296061350400. Its totient is φ = 23026967040.

The previous prime is 91820084641. The next prime is 91820084683. The reversal of 91820084664 is 46648002819.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 803067 + ... + 910250.

It is an arithmetic number, because the mean of its divisors is an integer number (2312979300).

Almost surely, 2^91820084664 is an apocalyptic number.

It is an amenable number.

91820084664 is an abundant number, since it is smaller than the sum of its proper divisors (204241265736).

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

91820084664 is a wasteful number, since it uses less digits than its factorization.

91820084664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713373 (or 1713369 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 91820084664 in words is "ninety-one billion, eight hundred twenty million, eighty-four thousand, six hundred sixty-four".