13418897115661 has 2 divisors, whose sum is σ = 13418897115662. Its totient is φ = 13418897115660.

The previous prime is 13418897115641. The next prime is 13418897115721. The reversal of 13418897115661 is 16651179881431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12900488475625 + 518408640036 = 3591725^2 + 720006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13418897115661 is a prime.

It is a super-2 number, since 2×13418897115661² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13418897115661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13418897115641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6709448557830 + 6709448557831.

It is an arithmetic number, because the mean of its divisors is an integer number (6709448557831).

Almost surely, 2^{13418897115661} is an apocalyptic number.

It is an amenable number.

13418897115661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13418897115661 is an equidigital number, since it uses as much as digits as its factorization.

13418897115661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 61.

The spelling of 13418897115661 in words is "thirteen trillion, four hundred eighteen billion, eight hundred ninety-seven million, one hundred fifteen thousand, six hundred sixty-one".