13298956681 has 2 divisors, whose sum is σ = 13298956682. Its totient is φ = 13298956680.

The previous prime is 13298956667. The next prime is 13298956703. The reversal of 13298956681 is 18665989231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11110214025 + 2188742656 = 105405^2 + 46784^2 .

It is an emirp because it is prime and its reverse (18665989231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13298956681 - 2²¹ = 13296859529 is a prime.

It is a super-2 number, since 2×13298956681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13298956651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6649478340 + 6649478341.

It is an arithmetic number, because the mean of its divisors is an integer number (6649478341).

Almost surely, 2^13298956681 is an apocalyptic number.

It is an amenable number.

13298956681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13298956681 is an equidigital number, since it uses as much as digits as its factorization.

13298956681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 58.

The spelling of 13298956681 in words is "thirteen billion, two hundred ninety-eight million, nine hundred fifty-six thousand, six hundred eighty-one".