13211622649 has 2 divisors, whose sum is σ = 13211622650. Its totient is φ = 13211622648.

The previous prime is 13211622601. The next prime is 13211622667. The reversal of 13211622649 is 94622611231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12441171600 + 770451049 = 111540^2 + 27757^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211622649 - 2⁷ = 13211622521 is a prime.

It is not a weakly prime, because it can be changed into another prime (13211622049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605811324 + 6605811325.

It is an arithmetic number, because the mean of its divisors is an integer number (6605811325).

Almost surely, 2^13211622649 is an apocalyptic number.

It is an amenable number.

13211622649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211622649 is an equidigital number, since it uses as much as digits as its factorization.

13211622649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The spelling of 13211622649 in words is "thirteen billion, two hundred eleven million, six hundred twenty-two thousand, six hundred forty-nine".