11913163919 has 4 divisors (see below), whose sum is σ = 11913559896. Its totient is φ = 11912767944.

The previous prime is 11913163903. The next prime is 11913163921. The reversal of 11913163919 is 91936131911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11913163919 - 2⁴ = 11913163903 is a prime.

It is a super-2 number, since 2×11913163919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11913163919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11913163949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148784 + ... + 214389.

It is an arithmetic number, because the mean of its divisors is an integer number (2978389974).

Almost surely, 2^11913163919 is an apocalyptic number.

11913163919 is a deficient number, since it is larger than the sum of its proper divisors (395977).

11913163919 is an equidigital number, since it uses as much as digits as its factorization.

11913163919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395976.

The product of its digits is 39366, while the sum is 44.

The spelling of 11913163919 in words is "eleven billion, nine hundred thirteen million, one hundred sixty-three thousand, nine hundred nineteen".