13620660653 has 2 divisors, whose sum is σ = 13620660654. Its totient is φ = 13620660652.

The previous prime is 13620660649. The next prime is 13620660667. The reversal of 13620660653 is 35606602631.

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., 11112954724 + 2507705929 = 105418^2 + 50077^2 .

It is a cyclic number.

It is not a de Polignac number, because 13620660653 - 2² = 13620660649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13620660953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6810330326 + 6810330327.

It is an arithmetic number, because the mean of its divisors is an integer number (6810330327).

Almost surely, 2^13620660653 is an apocalyptic number.

It is an amenable number.

13620660653 is a deficient number, since it is larger than the sum of its proper divisors (1).

13620660653 is an equidigital number, since it uses as much as digits as its factorization.

13620660653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 13620660653 in words is "thirteen billion, six hundred twenty million, six hundred sixty thousand, six hundred fifty-three".