256444051469 has 2 divisors, whose sum is σ = 256444051470. Its totient is φ = 256444051468.

The previous prime is 256444051439. The next prime is 256444051481. The reversal of 256444051469 is 964150444652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134845387369 + 121598664100 = 367213^2 + 348710^2 .

It is a cyclic number.

It is not a de Polignac number, because 256444051469 - 2²⁸ = 256175616013 is a prime.

It is a super-2 number, since 2×256444051469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256444051429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128222025734 + 128222025735.

It is an arithmetic number, because the mean of its divisors is an integer number (128222025735).

Almost surely, 2^256444051469 is an apocalyptic number.

It is an amenable number.

256444051469 is a deficient number, since it is larger than the sum of its proper divisors (1).

256444051469 is an equidigital number, since it uses as much as digits as its factorization.

256444051469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 256444051469 in words is "two hundred fifty-six billion, four hundred forty-four million, fifty-one thousand, four hundred sixty-nine".