13449603847657 has 2 divisors, whose sum is σ = 13449603847658. Its totient is φ = 13449603847656.

The previous prime is 13449603847637. The next prime is 13449603847703. The reversal of 13449603847657 is 75674830694431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8492497527721 + 4957106319936 = 2914189^2 + 2226456^2 .

It is a cyclic number.

It is not a de Polignac number, because 13449603847657 - 2²³ = 13449595459049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13449603847592 and 13449603847601.

It is not a weakly prime, because it can be changed into another prime (13449603847607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724801923828 + 6724801923829.

It is an arithmetic number, because the mean of its divisors is an integer number (6724801923829).

Almost surely, 2^{13449603847657} is an apocalyptic number.

It is an amenable number.

13449603847657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449603847657 is an equidigital number, since it uses as much as digits as its factorization.

13449603847657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 365783040, while the sum is 67.

The spelling of 13449603847657 in words is "thirteen trillion, four hundred forty-nine billion, six hundred three million, eight hundred forty-seven thousand, six hundred fifty-seven".