256245313451 has 4 divisors (see below), whose sum is σ = 256460105352. Its totient is φ = 256030521552.

The previous prime is 256245313447. The next prime is 256245313463. The reversal of 256245313451 is 154313542652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256245313451 - 2² = 256245313447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256245313399 and 256245313408.

It is not an unprimeable number, because it can be changed into a prime (256245313421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107394161 + ... + 107396546.

It is an arithmetic number, because the mean of its divisors is an integer number (64115026338).

Almost surely, 2^256245313451 is an apocalyptic number.

256245313451 is a deficient number, since it is larger than the sum of its proper divisors (214791901).

256245313451 is a wasteful number, since it uses less digits than its factorization.

256245313451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214791900.

The product of its digits is 432000, while the sum is 41.

The spelling of 256245313451 in words is "two hundred fifty-six billion, two hundred forty-five million, three hundred thirteen thousand, four hundred fifty-one".