13657663309 has 2 divisors, whose sum is σ = 13657663310. Its totient is φ = 13657663308.

The previous prime is 13657663249. The next prime is 13657663339. The reversal of 13657663309 is 90336675631.

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., 12706249284 + 951414025 = 112722^2 + 30845^2 .

It is a cyclic number.

It is not a de Polignac number, because 13657663309 - 2¹³ = 13657655117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13657663339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828831654 + 6828831655.

It is an arithmetic number, because the mean of its divisors is an integer number (6828831655).

Almost surely, 2^13657663309 is an apocalyptic number.

It is an amenable number.

13657663309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13657663309 is an equidigital number, since it uses as much as digits as its factorization.

13657663309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 49.

The spelling of 13657663309 in words is "thirteen billion, six hundred fifty-seven million, six hundred sixty-three thousand, three hundred nine".