256330653251 has 2 divisors, whose sum is σ = 256330653252. Its totient is φ = 256330653250.

The previous prime is 256330653217. The next prime is 256330653259. The reversal of 256330653251 is 152356033652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256330653251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256330653199 and 256330653208.

It is not a weakly prime, because it can be changed into another prime (256330653259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128165326625 + 128165326626.

It is an arithmetic number, because the mean of its divisors is an integer number (128165326626).

Almost surely, 2^256330653251 is an apocalyptic number.

256330653251 is a deficient number, since it is larger than the sum of its proper divisors (1).

256330653251 is an equidigital number, since it uses as much as digits as its factorization.

256330653251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 256330653251 in words is "two hundred fifty-six billion, three hundred thirty million, six hundred fifty-three thousand, two hundred fifty-one".