91162837786349 has 4 divisors (see below), whose sum is σ = 104186100327264. Its totient is φ = 78139575245436.

The previous prime is 91162837786337. The next prime is 91162837786357. The reversal of 91162837786349 is 94368773826119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91162837786349 - 2²⁸ = 91162569350893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91162837786369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6511631270447 + ... + 6511631270460.

It is an arithmetic number, because the mean of its divisors is an integer number (26046525081816).

Almost surely, 2^{91162837786349} is an apocalyptic number.

It is an amenable number.

91162837786349 is a deficient number, since it is larger than the sum of its proper divisors (13023262540915).

91162837786349 is a wasteful number, since it uses less digits than its factorization.

91162837786349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13023262540914.

The product of its digits is 658409472, while the sum is 74.

The spelling of 91162837786349 in words is "ninety-one trillion, one hundred sixty-two billion, eight hundred thirty-seven million, seven hundred eighty-six thousand, three hundred forty-nine".