256243219879 has 2 divisors, whose sum is σ = 256243219880. Its totient is φ = 256243219878.

The previous prime is 256243219831. The next prime is 256243219933. The reversal of 256243219879 is 978912342652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256243219879 - 2⁷ = 256243219751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256243219079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128121609939 + 128121609940.

It is an arithmetic number, because the mean of its divisors is an integer number (128121609940).

Almost surely, 2^256243219879 is an apocalyptic number.

256243219879 is a deficient number, since it is larger than the sum of its proper divisors (1).

256243219879 is an equidigital number, since it uses as much as digits as its factorization.

256243219879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The spelling of 256243219879 in words is "two hundred fifty-six billion, two hundred forty-three million, two hundred nineteen thousand, eight hundred seventy-nine".