13994545517 has 2 divisors, whose sum is σ = 13994545518. Its totient is φ = 13994545516.

The previous prime is 13994545501. The next prime is 13994545547. The reversal of 13994545517 is 71554549931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13949735881 + 44809636 = 118109^2 + 6694^2 .

It is a cyclic number.

It is not a de Polignac number, because 13994545517 - 2⁴ = 13994545501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13994545547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6997272758 + 6997272759.

It is an arithmetic number, because the mean of its divisors is an integer number (6997272759).

Almost surely, 2^13994545517 is an apocalyptic number.

It is an amenable number.

13994545517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13994545517 is an equidigital number, since it uses as much as digits as its factorization.

13994545517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 53.

The spelling of 13994545517 in words is "thirteen billion, nine hundred ninety-four million, five hundred forty-five thousand, five hundred seventeen".