13468668637 has 2 divisors, whose sum is σ = 13468668638. Its totient is φ = 13468668636.

The previous prime is 13468668623. The next prime is 13468668649. The reversal of 13468668637 is 73686686431.

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., 13246628836 + 222039801 = 115094^2 + 14901^2 .

It is an emirp because it is prime and its reverse (73686686431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13468668637 - 2³¹ = 11321184989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13468668617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734334318 + 6734334319.

It is an arithmetic number, because the mean of its divisors is an integer number (6734334319).

Almost surely, 2^13468668637 is an apocalyptic number.

It is an amenable number.

13468668637 is a deficient number, since it is larger than the sum of its proper divisors (1).

13468668637 is an equidigital number, since it uses as much as digits as its factorization.

13468668637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 58.

The spelling of 13468668637 in words is "thirteen billion, four hundred sixty-eight million, six hundred sixty-eight thousand, six hundred thirty-seven".