13444540919 has 2 divisors, whose sum is σ = 13444540920. Its totient is φ = 13444540918.

The previous prime is 13444540897. The next prime is 13444540937. The reversal of 13444540919 is 91904544431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13444540919 - 2²⁸ = 13176105463 is a prime.

It is a super-2 number, since 2×13444540919² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13444540919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13444540979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722270459 + 6722270460.

It is an arithmetic number, because the mean of its divisors is an integer number (6722270460).

Almost surely, 2^13444540919 is an apocalyptic number.

13444540919 is a deficient number, since it is larger than the sum of its proper divisors (1).

13444540919 is an equidigital number, since it uses as much as digits as its factorization.

13444540919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 13444540919 in words is "thirteen billion, four hundred forty-four million, five hundred forty thousand, nine hundred nineteen".