13643359856 has 40 divisors (see below), whose sum is σ = 30237335520. Its totient is φ = 5841921024.

The previous prime is 13643359841. The next prime is 13643359867. The reversal of 13643359856 is 65895334631.

It is a super-2 number, since 2×13643359856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13643359798 and 13643359807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72500 + ... + 180396.

It is an arithmetic number, because the mean of its divisors is an integer number (755933388).

Almost surely, 2^13643359856 is an apocalyptic number.

13643359856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13643359856 is an abundant number, since it is smaller than the sum of its proper divisors (16593975664).

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

13643359856 is a wasteful number, since it uses less digits than its factorization.

13643359856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109041 (or 109035 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 53.

The spelling of 13643359856 in words is "thirteen billion, six hundred forty-three million, three hundred fifty-nine thousand, eight hundred fifty-six".