91803668364 has 18 divisors (see below), whose sum is σ = 232059272900. Its totient is φ = 30601222776.

The previous prime is 91803668357. The next prime is 91803668371. The reversal of 91803668364 is 46386630819.

It is an interprime number because it is at equal distance from previous prime (91803668357) and next prime (91803668371).

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 91803668364.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1275050914 + ... + 1275050985.

Almost surely, 2^91803668364 is an apocalyptic number.

It is an amenable number.

91803668364 is an abundant number, since it is smaller than the sum of its proper divisors (140255604536).

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

91803668364 is a wasteful number, since it uses less digits than its factorization.

91803668364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550101909 (or 2550101904 counting only the distinct ones).

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

The spelling of 91803668364 in words is "ninety-one billion, eight hundred three million, six hundred sixty-eight thousand, three hundred sixty-four".