13268393568 has 120 divisors (see below), whose sum is σ = 39557088648. Its totient is φ = 4362149376.

The previous prime is 13268393531. The next prime is 13268393569. The reversal of 13268393568 is 86539386231.

It is a happy number.

13268393568 is a `hidden beast` number, since 13 + 2 + 68 + 3 + 9 + 3 + 568 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13268393569) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154155 + ... + 224277.

Almost surely, 2^13268393568 is an apocalyptic number.

13268393568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13268393568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19778544324).

13268393568 is an abundant number, since it is smaller than the sum of its proper divisors (26288695080).

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

13268393568 is an equidigital number, since it uses as much as digits as its factorization.

13268393568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70218 (or 70201 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 13268393568 in words is "thirteen billion, two hundred sixty-eight million, three hundred ninety-three thousand, five hundred sixty-eight".