11855117419 has 2 divisors, whose sum is σ = 11855117420. Its totient is φ = 11855117418.

The previous prime is 11855117411. The next prime is 11855117509. The reversal of 11855117419 is 91471155811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11855117419 - 2³ = 11855117411 is a prime.

It is a super-2 number, since 2×11855117419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11855117411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5927558709 + 5927558710.

It is an arithmetic number, because the mean of its divisors is an integer number (5927558710).

Almost surely, 2^11855117419 is an apocalyptic number.

11855117419 is a deficient number, since it is larger than the sum of its proper divisors (1).

11855117419 is an equidigital number, since it uses as much as digits as its factorization.

11855117419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 43.

The spelling of 11855117419 in words is "eleven billion, eight hundred fifty-five million, one hundred seventeen thousand, four hundred nineteen".