91162837786357 has 2 divisors, whose sum is σ = 91162837786358. Its totient is φ = 91162837786356.

The previous prime is 91162837786337. The next prime is 91162837786369. The reversal of 91162837786357 is 75368773826119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91122564922596 + 40272863761 = 9545814^2 + 200681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91162837786357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91162837786357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91162837786337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45581418893178 + 45581418893179.

It is an arithmetic number, because the mean of its divisors is an integer number (45581418893179).

Almost surely, 2^{91162837786357} is an apocalyptic number.

It is an amenable number.

91162837786357 is a deficient number, since it is larger than the sum of its proper divisors (1).

91162837786357 is an equidigital number, since it uses as much as digits as its factorization.

91162837786357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640120320, while the sum is 73.

The spelling of 91162837786357 in words is "ninety-one trillion, one hundred sixty-two billion, eight hundred thirty-seven million, seven hundred eighty-six thousand, three hundred fifty-seven".