256656432603341 has 4 divisors (see below), whose sum is σ = 256798153440384. Its totient is φ = 256514711766300.

The previous prime is 256656432603301. The next prime is 256656432603349. The reversal of 256656432603341 is 143306234656652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256656432603341 - 2⁴⁶ = 186287688425677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256656432603349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70860415805 + ... + 70860419426.

It is an arithmetic number, because the mean of its divisors is an integer number (64199538360096).

Almost surely, 2^{256656432603341} is an apocalyptic number.

It is an amenable number.

256656432603341 is a deficient number, since it is larger than the sum of its proper divisors (141720837043).

256656432603341 is a wasteful number, since it uses less digits than its factorization.

256656432603341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141720837042.

The product of its (nonzero) digits is 55987200, while the sum is 56.

The spelling of 256656432603341 in words is "two hundred fifty-six trillion, six hundred fifty-six billion, four hundred thirty-two million, six hundred three thousand, three hundred forty-one".