91051323806913 has 8 divisors (see below), whose sum is σ = 121404824832000. Its totient is φ = 60699352659888.

The previous prime is 91051323806909. The next prime is 91051323806917. The reversal of 91051323806913 is 31960832315019.

It is an interprime number because it is at equal distance from previous prime (91051323806909) and next prime (91051323806917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91051323806913 - 2² = 91051323806909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91051323806917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382330638 + ... + 382568711.

It is an arithmetic number, because the mean of its divisors is an integer number (15175603104000).

Almost surely, 2^{91051323806913} is an apocalyptic number.

It is an amenable number.

91051323806913 is a deficient number, since it is larger than the sum of its proper divisors (30353501025087).

91051323806913 is a wasteful number, since it uses less digits than its factorization.

91051323806913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764939031.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 91051323806913 in words is "ninety-one trillion, fifty-one billion, three hundred twenty-three million, eight hundred six thousand, nine hundred thirteen".