13508818513 has 2 divisors, whose sum is σ = 13508818514. Its totient is φ = 13508818512.

The previous prime is 13508818471. The next prime is 13508818567. The reversal of 13508818513 is 31581880531.

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., 13476191569 + 32626944 = 116087^2 + 5712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13508818513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13508818513.

It is not a weakly prime, because it can be changed into another prime (13548818513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754409256 + 6754409257.

It is an arithmetic number, because the mean of its divisors is an integer number (6754409257).

Almost surely, 2^13508818513 is an apocalyptic number.

It is an amenable number.

13508818513 is a deficient number, since it is larger than the sum of its proper divisors (1).

13508818513 is an equidigital number, since it uses as much as digits as its factorization.

13508818513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 13508818513 in words is "thirteen billion, five hundred eight million, eight hundred eighteen thousand, five hundred thirteen".