11891108357 has 2 divisors, whose sum is σ = 11891108358. Its totient is φ = 11891108356.

The previous prime is 11891108347. The next prime is 11891108363. The reversal of 11891108357 is 75380119811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10556740516 + 1334367841 = 102746^2 + 36529^2 .

It is an emirp because it is prime and its reverse (75380119811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11891108357 - 2⁸ = 11891108101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891108347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945554178 + 5945554179.

It is an arithmetic number, because the mean of its divisors is an integer number (5945554179).

Almost surely, 2^11891108357 is an apocalyptic number.

It is an amenable number.

11891108357 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891108357 is an equidigital number, since it uses as much as digits as its factorization.

11891108357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 44.

The spelling of 11891108357 in words is "eleven billion, eight hundred ninety-one million, one hundred eight thousand, three hundred fifty-seven".