11719934557 has 4 divisors (see below), whose sum is σ = 11791836160. Its totient is φ = 11648032956.

The previous prime is 11719934549. The next prime is 11719934563. The reversal of 11719934557 is 75543991711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11719934557 - 2³ = 11719934549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11719934507) 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, 35950557 + ... + 35950882.

It is an arithmetic number, because the mean of its divisors is an integer number (2947959040).

Almost surely, 2^11719934557 is an apocalyptic number.

It is an amenable number.

11719934557 is a deficient number, since it is larger than the sum of its proper divisors (71901603).

11719934557 is an equidigital number, since it uses as much as digits as its factorization.

11719934557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71901602.

The product of its digits is 1190700, while the sum is 52.

The spelling of 11719934557 in words is "eleven billion, seven hundred nineteen million, nine hundred thirty-four thousand, five hundred fifty-seven".