256545648 has 30 divisors (see below), whose sum is σ = 717971904. Its totient is φ = 85515168.

The previous prime is 256545647. The next prime is 256545683. The reversal of 256545648 is 846545652.

256545648 is a `hidden beast` number, since 2 + 565 + 45 + 6 + 48 = 666.

256545648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256545643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890640 + ... + 890927.

Almost surely, 2^256545648 is an apocalyptic number.

It is an amenable number.

256545648 is an abundant number, since it is smaller than the sum of its proper divisors (461426256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256545648 is a wasteful number, since it uses less digits than its factorization.

256545648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781581 (or 1781572 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 256545648 is about 16017.0424236187. The cubic root of 256545648 is about 635.4112268012.

The spelling of 256545648 in words is "two hundred fifty-six million, five hundred forty-five thousand, six hundred forty-eight".