13620713537617 has 2 divisors, whose sum is σ = 13620713537618. Its totient is φ = 13620713537616.

The previous prime is 13620713537603. The next prime is 13620713537659. The reversal of 13620713537617 is 71673531702631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7807643054656 + 5813070482961 = 2794216^2 + 2411031^2 .

It is an emirp because it is prime and its reverse (71673531702631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13620713537617 is a prime.

It is not a weakly prime, because it can be changed into another prime (13620713532617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810356768808 + 6810356768809.

It is an arithmetic number, because the mean of its divisors is an integer number (6810356768809).

Almost surely, 2^{13620713537617} is an apocalyptic number.

It is an amenable number.

13620713537617 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620713537617 is an equidigital number, since it uses as much as digits as its factorization.

13620713537617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3333960, while the sum is 52.

The spelling of 13620713537617 in words is "thirteen trillion, six hundred twenty billion, seven hundred thirteen million, five hundred thirty-seven thousand, six hundred seventeen".