256507244213351 has 2 divisors, whose sum is σ = 256507244213352. Its totient is φ = 256507244213350.

The previous prime is 256507244213317. The next prime is 256507244213357. The reversal of 256507244213351 is 153312442705652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256507244213351 - 2⁴² = 252109197702247 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256507244213351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256507244213357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128253622106675 + 128253622106676.

It is an arithmetic number, because the mean of its divisors is an integer number (128253622106676).

Almost surely, 2^{256507244213351} is an apocalyptic number.

256507244213351 is a deficient number, since it is larger than the sum of its proper divisors (1).

256507244213351 is an equidigital number, since it uses as much as digits as its factorization.

256507244213351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 256507244213351 in words is "two hundred fifty-six trillion, five hundred seven billion, two hundred forty-four million, two hundred thirteen thousand, three hundred fifty-one".