256673611 has 2 divisors, whose sum is σ = 256673612. Its totient is φ = 256673610.

The previous prime is 256673563. The next prime is 256673657. The reversal of 256673611 is 116376652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256673611 - 2⁹ = 256673099 is a prime.

It is not a weakly prime, because it can be changed into another prime (256673111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128336805 + 128336806.

It is an arithmetic number, because the mean of its divisors is an integer number (128336806).

Almost surely, 2^256673611 is an apocalyptic number.

256673611 is a deficient number, since it is larger than the sum of its proper divisors (1).

256673611 is an equidigital number, since it uses as much as digits as its factorization.

256673611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 256673611 is about 16021.0365145330. The cubic root of 256673611 is about 635.5168553217.

The spelling of 256673611 in words is "two hundred fifty-six million, six hundred seventy-three thousand, six hundred eleven".