11813595666391 has 2 divisors, whose sum is σ = 11813595666392. Its totient is φ = 11813595666390.

The previous prime is 11813595666349. The next prime is 11813595666419. The reversal of 11813595666391 is 19366659531811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11813595666391 - 2⁷ = 11813595666263 is a prime.

It is a super-2 number, since 2×11813595666391² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11813595606391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5906797833195 + 5906797833196.

It is an arithmetic number, because the mean of its divisors is an integer number (5906797833196).

Almost surely, 2^{11813595666391} is an apocalyptic number.

11813595666391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11813595666391 is an equidigital number, since it uses as much as digits as its factorization.

11813595666391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31492800, while the sum is 64.

The spelling of 11813595666391 in words is "eleven trillion, eight hundred thirteen billion, five hundred ninety-five million, six hundred sixty-six thousand, three hundred ninety-one".