13635663431 has 12 divisors (see below), whose sum is σ = 14786436600. Its totient is φ = 12568701600.

The previous prime is 13635663407. The next prime is 13635663493. The reversal of 13635663431 is 13436653631.

It is not a de Polignac number, because 13635663431 - 2¹⁰ = 13635662407 is a prime.

It is a super-2 number, since 2×13635663431² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13635663031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60920 + ... + 176018.

It is an arithmetic number, because the mean of its divisors is an integer number (1232203050).

Almost surely, 2^13635663431 is an apocalyptic number.

13635663431 is a deficient number, since it is larger than the sum of its proper divisors (1150773169).

13635663431 is a wasteful number, since it uses less digits than its factorization.

13635663431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115826 (or 115813 counting only the distinct ones).

The product of its digits is 349920, while the sum is 41.

The spelling of 13635663431 in words is "thirteen billion, six hundred thirty-five million, six hundred sixty-three thousand, four hundred thirty-one".