256608619 has 2 divisors, whose sum is σ = 256608620. Its totient is φ = 256608618.

The previous prime is 256608613. The next prime is 256608629. The reversal of 256608619 is 916806652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256608619 - 2²⁵ = 223054187 is a prime.

It is a super-2 number, since 2×256608619² = 131695966690174322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256608613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128304309 + 128304310.

It is an arithmetic number, because the mean of its divisors is an integer number (128304310).

Almost surely, 2^256608619 is an apocalyptic number.

256608619 is a deficient number, since it is larger than the sum of its proper divisors (1).

256608619 is an equidigital number, since it uses as much as digits as its factorization.

256608619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 256608619 is about 16019.0080529351. The cubic root of 256608619 is about 635.4632113211.

The spelling of 256608619 in words is "two hundred fifty-six million, six hundred eight thousand, six hundred nineteen".