256207794419 has 2 divisors, whose sum is σ = 256207794420. Its totient is φ = 256207794418.

The previous prime is 256207794413. The next prime is 256207794433. The reversal of 256207794419 is 914497702652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256207794419 - 2³⁶ = 187488317683 is a prime.

It is a super-2 number, since 2×256207794419² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256207794413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128103897209 + 128103897210.

It is an arithmetic number, because the mean of its divisors is an integer number (128103897210).

Almost surely, 2^256207794419 is an apocalyptic number.

256207794419 is a deficient number, since it is larger than the sum of its proper divisors (1).

256207794419 is an equidigital number, since it uses as much as digits as its factorization.

256207794419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 256207794419 in words is "two hundred fifty-six billion, two hundred seven million, seven hundred ninety-four thousand, four hundred nineteen".