13617280656 has 120 divisors (see below), whose sum is σ = 45166873024. Its totient is φ = 3890643840.

The previous prime is 13617280631. The next prime is 13617280667. The reversal of 13617280656 is 65608271631.

13617280656 is a `hidden beast` number, since 1 + 3 + 617 + 28 + 0 + 6 + 5 + 6 = 666.

13617280656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222955 + ... + 277386.

Almost surely, 2^13617280656 is an apocalyptic number.

13617280656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13617280656 is an abundant number, since it is smaller than the sum of its proper divisors (31549592368).

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

13617280656 is an equidigital number, since it uses as much as digits as its factorization.

13617280656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500371 (or 500353 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 13617280656 in words is "thirteen billion, six hundred seventeen million, two hundred eighty thousand, six hundred fifty-six".