13468668649 has 2 divisors, whose sum is σ = 13468668650. Its totient is φ = 13468668648.

The previous prime is 13468668637. The next prime is 13468668671. The reversal of 13468668649 is 94686686431.

13468668649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10298190400 + 3170478249 = 101480^2 + 56307^2 .

It is an emirp because it is prime and its reverse (94686686431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13468668649 - 2⁵ = 13468668617 is a prime.

It is not a weakly prime, because it can be changed into another prime (13468668349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734334324 + 6734334325.

It is an arithmetic number, because the mean of its divisors is an integer number (6734334325).

Almost surely, 2^13468668649 is an apocalyptic number.

It is an amenable number.

13468668649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13468668649 is an equidigital number, since it uses as much as digits as its factorization.

13468668649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35831808, while the sum is 61.

The spelling of 13468668649 in words is "thirteen billion, four hundred sixty-eight million, six hundred sixty-eight thousand, six hundred forty-nine".