256448977 has 2 divisors, whose sum is σ = 256448978. Its totient is φ = 256448976.

The previous prime is 256448971. The next prime is 256448993. The reversal of 256448977 is 779844652.

256448977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188485441 + 67963536 = 13729^2 + 8244^2 .

It is a cyclic number.

It is not a de Polignac number, because 256448977 - 2⁷ = 256448849 is a prime.

It is not a weakly prime, because it can be changed into another prime (256448971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128224488 + 128224489.

It is an arithmetic number, because the mean of its divisors is an integer number (128224489).

Almost surely, 2^256448977 is an apocalyptic number.

It is an amenable number.

256448977 is a deficient number, since it is larger than the sum of its proper divisors (1).

256448977 is an equidigital number, since it uses as much as digits as its factorization.

256448977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The square root of 256448977 is about 16014.0243848946. The cubic root of 256448977 is about 635.3314053266.

The spelling of 256448977 in words is "two hundred fifty-six million, four hundred forty-eight thousand, nine hundred seventy-seven".