256228502800 has 30 divisors (see below), whose sum is σ = 615588978938. Its totient is φ = 102491400960.

The previous prime is 256228502741. The next prime is 256228502861. The reversal of 256228502800 is 8205822652.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 21790483456 + 234438019344 = 147616^2 + 484188^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 320285229 + ... + 320286028.

Almost surely, 2^256228502800 is an apocalyptic number.

256228502800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256228502800 is an abundant number, since it is smaller than the sum of its proper divisors (359360476138).

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

256228502800 is a wasteful number, since it uses less digits than its factorization.

256228502800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640571275 (or 640571264 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 256228502800 in words is "two hundred fifty-six billion, two hundred twenty-eight million, five hundred two thousand, eight hundred".