91393660000 has 60 divisors (see below), whose sum is σ = 224842161852. Its totient is φ = 36557456000.

The previous prime is 91393659971. The next prime is 91393660009. The reversal of 91393660000 is 6639319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91393660009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2264842 + ... + 2304841.

Almost surely, 2^91393660000 is an apocalyptic number.

It is an amenable number.

91393660000 is an abundant number, since it is smaller than the sum of its proper divisors (133448501852).

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

91393660000 is an equidigital number, since it uses as much as digits as its factorization.

91393660000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569713 (or 4569690 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 37.

The spelling of 91393660000 in words is "ninety-one billion, three hundred ninety-three million, six hundred sixty thousand".