13568390838 has 20 divisors (see below), whose sum is σ = 30403246500. Its totient is φ = 4522796892.

The previous prime is 13568390833. The next prime is 13568390867. The reversal of 13568390838 is 83809386531.

It is a happy number.

13568390838 is a `hidden beast` number, since 13 + 568 + 39 + 0 + 8 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13568390833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41877588 + ... + 41877911.

It is an arithmetic number, because the mean of its divisors is an integer number (1520162325).

Almost surely, 2^13568390838 is an apocalyptic number.

13568390838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13568390838 is an abundant number, since it is smaller than the sum of its proper divisors (16834855662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13568390838 is an equidigital number, since it uses as much as digits as its factorization.

13568390838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83755513 (or 83755504 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 13568390838 in words is "thirteen billion, five hundred sixty-eight million, three hundred ninety thousand, eight hundred thirty-eight".