12655856641 has 8 divisors (see below), whose sum is σ = 12703613184. Its totient is φ = 12608172960.

The previous prime is 12655856639. The next prime is 12655856657. The reversal of 12655856641 is 14665855621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12655856641 - 2¹ = 12655856639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12655886641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343221 + ... + 378301.

It is an arithmetic number, because the mean of its divisors is an integer number (1587951648).

Almost surely, 2^12655856641 is an apocalyptic number.

It is an amenable number.

12655856641 is a deficient number, since it is larger than the sum of its proper divisors (47756543).

12655856641 is an equidigital number, since it uses as much as digits as its factorization.

12655856641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36431.

The product of its digits is 1728000, while the sum is 49.

The spelling of 12655856641 in words is "twelve billion, six hundred fifty-five million, eight hundred fifty-six thousand, six hundred forty-one".