13601329856 has 56 divisors (see below), whose sum is σ = 27896125056. Its totient is φ = 6572943360.

The previous prime is 13601329849. The next prime is 13601329867. The reversal of 13601329856 is 65892310631.

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, 1736060 + ... + 1743876.

Almost surely, 2^13601329856 is an apocalyptic number.

13601329856 is a gapful number since it is divisible by the number (16) 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 13601329856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13948062528).

13601329856 is an abundant number, since it is smaller than the sum of its proper divisors (14294795200).

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

13601329856 is an equidigital number, since it uses as much as digits as its factorization.

13601329856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8737 (or 8727 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 13601329856 in words is "thirteen billion, six hundred one million, three hundred twenty-nine thousand, eight hundred fifty-six".