13309453649 has 2 divisors, whose sum is σ = 13309453650. Its totient is φ = 13309453648.

The previous prime is 13309453643. The next prime is 13309453741. The reversal of 13309453649 is 94635490331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11350771600 + 1958682049 = 106540^2 + 44257^2 .

It is a cyclic number.

It is not a de Polignac number, because 13309453649 - 2²⁰ = 13308405073 is a prime.

It is not a weakly prime, because it can be changed into another prime (13309453643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6654726824 + 6654726825.

It is an arithmetic number, because the mean of its divisors is an integer number (6654726825).

Almost surely, 2^13309453649 is an apocalyptic number.

It is an amenable number.

13309453649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309453649 is an equidigital number, since it uses as much as digits as its factorization.

13309453649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The spelling of 13309453649 in words is "thirteen billion, three hundred nine million, four hundred fifty-three thousand, six hundred forty-nine".