13635663493 has 2 divisors, whose sum is σ = 13635663494. Its totient is φ = 13635663492.

The previous prime is 13635663407. The next prime is 13635663511. The reversal of 13635663493 is 39436653631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8549406369 + 5086257124 = 92463^2 + 71318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13635663493 is a prime.

It is a super-2 number, since 2×13635663493² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13635663403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6817831746 + 6817831747.

It is an arithmetic number, because the mean of its divisors is an integer number (6817831747).

Almost surely, 2^13635663493 is an apocalyptic number.

It is an amenable number.

13635663493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13635663493 is an equidigital number, since it uses as much as digits as its factorization.

13635663493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 49.

The spelling of 13635663493 in words is "thirteen billion, six hundred thirty-five million, six hundred sixty-three thousand, four hundred ninety-three".