11919563749 has 2 divisors, whose sum is σ = 11919563750. Its totient is φ = 11919563748.

The previous prime is 11919563729. The next prime is 11919563809. The reversal of 11919563749 is 94736591911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6024088225 + 5895475524 = 77615^2 + 76782^2 .

It is a cyclic number.

It is not a de Polignac number, because 11919563749 - 2⁵ = 11919563717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11919563749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11919563729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959781874 + 5959781875.

It is an arithmetic number, because the mean of its divisors is an integer number (5959781875).

Almost surely, 2^11919563749 is an apocalyptic number.

It is an amenable number.

11919563749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11919563749 is an equidigital number, since it uses as much as digits as its factorization.

11919563749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 55.

The spelling of 11919563749 in words is "eleven billion, nine hundred nineteen million, five hundred sixty-three thousand, seven hundred forty-nine".