13637398849 has 2 divisors, whose sum is σ = 13637398850. Its totient is φ = 13637398848.

The previous prime is 13637398829. The next prime is 13637398867. The reversal of 13637398849 is 94889373631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9267527824 + 4369871025 = 96268^2 + 66105^2 .

It is a cyclic number.

It is not a de Polignac number, because 13637398849 - 2¹⁵ = 13637366081 is a prime.

It is not a weakly prime, because it can be changed into another prime (13637398829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6818699424 + 6818699425.

It is an arithmetic number, because the mean of its divisors is an integer number (6818699425).

Almost surely, 2^13637398849 is an apocalyptic number.

It is an amenable number.

13637398849 is a deficient number, since it is larger than the sum of its proper divisors (1).

13637398849 is an equidigital number, since it uses as much as digits as its factorization.

13637398849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 61.

The spelling of 13637398849 in words is "thirteen billion, six hundred thirty-seven million, three hundred ninety-eight thousand, eight hundred forty-nine".