11919749013 has 12 divisors (see below), whose sum is σ = 17228110380. Its totient is φ = 7941563136.

The previous prime is 11919748999. The next prime is 11919749059. The reversal of 11919749013 is 31094791911.

It can be written as a sum of positive squares in 2 ways, for example, as 3144181329 + 8775567684 = 56073^2 + 93678^2 .

It is not a de Polignac number, because 11919749013 - 2¹⁰ = 11919747989 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11919749013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11919749063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396028 + ... + 425061.

It is an arithmetic number, because the mean of its divisors is an integer number (1435675865).

Almost surely, 2^11919749013 is an apocalyptic number.

It is an amenable number.

11919749013 is a deficient number, since it is larger than the sum of its proper divisors (5308361367).

11919749013 is a wasteful number, since it uses less digits than its factorization.

11919749013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822708 (or 822705 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The spelling of 11919749013 in words is "eleven billion, nine hundred nineteen million, seven hundred forty-nine thousand, thirteen".