13111918349 has 2 divisors, whose sum is σ = 13111918350. Its totient is φ = 13111918348.

The previous prime is 13111918331. The next prime is 13111918381. The reversal of 13111918349 is 94381911131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6864122500 + 6247795849 = 82850^2 + 79043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13111918349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13111918649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555959174 + 6555959175.

It is an arithmetic number, because the mean of its divisors is an integer number (6555959175).

Almost surely, 2^13111918349 is an apocalyptic number.

It is an amenable number.

13111918349 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111918349 is an equidigital number, since it uses as much as digits as its factorization.

13111918349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 41.

The spelling of 13111918349 in words is "thirteen billion, one hundred eleven million, nine hundred eighteen thousand, three hundred forty-nine".