256765456 has 10 divisors (see below), whose sum is σ = 497483102. Its totient is φ = 128382720.

The previous prime is 256765451. The next prime is 256765469. The reversal of 256765456 is 654567652.

It can be written as a sum of positive squares in only one way, i.e., 192765456 + 64000000 = 13884^2 + 8000^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256765451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8023905 + ... + 8023936.

Almost surely, 2^256765456 is an apocalyptic number.

It is an amenable number.

256765456 is a deficient number, since it is larger than the sum of its proper divisors (240717646).

256765456 is a wasteful number, since it uses less digits than its factorization.

256765456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16047849 (or 16047843 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 46.

The square root of 256765456 is about 16023.9026457352. The cubic root of 256765456 is about 635.5926481866.

The spelling of 256765456 in words is "two hundred fifty-six million, seven hundred sixty-five thousand, four hundred fifty-six".