13603306681 has 2 divisors, whose sum is σ = 13603306682. Its totient is φ = 13603306680.

The previous prime is 13603306657. The next prime is 13603306723. The reversal of 13603306681 is 18660330631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8070327225 + 5532979456 = 89835^2 + 74384^2 .

It is an emirp because it is prime and its reverse (18660330631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13603306681 - 2²¹ = 13601209529 is a prime.

It is a super-2 number, since 2×13603306681² (a number of 21 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 13603306681.

It is not a weakly prime, because it can be changed into another prime (13603306781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6801653340 + 6801653341.

It is an arithmetic number, because the mean of its divisors is an integer number (6801653341).

Almost surely, 2^13603306681 is an apocalyptic number.

It is an amenable number.

13603306681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13603306681 is an equidigital number, since it uses as much as digits as its factorization.

13603306681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 13603306681 in words is "thirteen billion, six hundred three million, three hundred six thousand, six hundred eighty-one".