11911142519 has 2 divisors, whose sum is σ = 11911142520. Its totient is φ = 11911142518.

The previous prime is 11911142513. The next prime is 11911142557. The reversal of 11911142519 is 91524111911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11911142519 - 2³² = 7616175223 is a prime.

It is a super-2 number, since 2×11911142519² (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 (11911142513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5955571259 + 5955571260.

It is an arithmetic number, because the mean of its divisors is an integer number (5955571260).

Almost surely, 2^11911142519 is an apocalyptic number.

11911142519 is a deficient number, since it is larger than the sum of its proper divisors (1).

11911142519 is an equidigital number, since it uses as much as digits as its factorization.

11911142519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 35.

The spelling of 11911142519 in words is "eleven billion, nine hundred eleven million, one hundred forty-two thousand, five hundred nineteen".