256867246633 has 2 divisors, whose sum is σ = 256867246634. Its totient is φ = 256867246632.

The previous prime is 256867246583. The next prime is 256867246651. The reversal of 256867246633 is 336642768652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187915314064 + 68951932569 = 433492^2 + 262587^2 .

It is a cyclic number.

It is not a de Polignac number, because 256867246633 - 2²¹ = 256865149481 is a prime.

It is not a weakly prime, because it can be changed into another prime (256867046633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128433623316 + 128433623317.

It is an arithmetic number, because the mean of its divisors is an integer number (128433623317).

Almost surely, 2^256867246633 is an apocalyptic number.

It is an amenable number.

256867246633 is a deficient number, since it is larger than the sum of its proper divisors (1).

256867246633 is an equidigital number, since it uses as much as digits as its factorization.

256867246633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 58.

The spelling of 256867246633 in words is "two hundred fifty-six billion, eight hundred sixty-seven million, two hundred forty-six thousand, six hundred thirty-three".