256249843200 has 720 divisors, whose sum is σ = 992374358976. Its totient is φ = 62772019200.

The previous prime is 256249843193. The next prime is 256249843211. The reversal of 256249843200 is 2348942652.

256249843200 is a `hidden beast` number, since 2 + 5 + 6 + 249 + 84 + 320 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 594546985 + ... + 594547415.

Almost surely, 2^256249843200 is an apocalyptic number.

256249843200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256249843200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496187179488).

256249843200 is an abundant number, since it is smaller than the sum of its proper divisors (736124515776).

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

256249843200 is a wasteful number, since it uses less digits than its factorization.

256249843200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 256249843200 in words is "two hundred fifty-six billion, two hundred forty-nine million, eight hundred forty-three thousand, two hundred".