11855899519 has 2 divisors, whose sum is σ = 11855899520. Its totient is φ = 11855899518.

The previous prime is 11855899477. The next prime is 11855899543. The reversal of 11855899519 is 91599855811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11855899519 - 2⁹ = 11855899007 is a prime.

It is a super-2 number, since 2×11855899519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11855893519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5927949759 + 5927949760.

It is an arithmetic number, because the mean of its divisors is an integer number (5927949760).

Almost surely, 2^11855899519 is an apocalyptic number.

11855899519 is a deficient number, since it is larger than the sum of its proper divisors (1).

11855899519 is an equidigital number, since it uses as much as digits as its factorization.

11855899519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 61.

The spelling of 11855899519 in words is "eleven billion, eight hundred fifty-five million, eight hundred ninety-nine thousand, five hundred nineteen".