256776827 has 4 divisors (see below), whose sum is σ = 256982040. Its totient is φ = 256571616.

The previous prime is 256776803. The next prime is 256776829. The reversal of 256776827 is 728677652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256776827 - 2¹⁴ = 256760443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256776829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100718 + ... + 103235.

It is an arithmetic number, because the mean of its divisors is an integer number (64245510).

Almost surely, 2^256776827 is an apocalyptic number.

256776827 is a deficient number, since it is larger than the sum of its proper divisors (205213).

256776827 is a wasteful number, since it uses less digits than its factorization.

256776827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205212.

The product of its digits is 1975680, while the sum is 50.

The square root of 256776827 is about 16024.2574554954. The cubic root of 256776827 is about 635.6020305719.

The spelling of 256776827 in words is "two hundred fifty-six million, seven hundred seventy-six thousand, eight hundred twenty-seven".