256851302400 has 2304 divisors, whose sum is σ = 1247920128000. Its totient is φ = 50164531200.

The previous prime is 256851302377. The next prime is 256851302401. The reversal of 256851302400 is 4203158652.

256851302400 is a `hidden beast` number, since 2 + 568 + 51 + 3 + 0 + 2 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256851302401) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2022451137 + ... + 2022451263.

It is an arithmetic number, because the mean of its divisors is an integer number (541632000).

Almost surely, 2^256851302400 is an apocalyptic number.

256851302400 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 256851302400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623960064000).

256851302400 is an abundant number, since it is smaller than the sum of its proper divisors (991068825600).

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

256851302400 is a wasteful number, since it uses less digits than its factorization.

256851302400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 256851302400 in words is "two hundred fifty-six billion, eight hundred fifty-one million, three hundred two thousand, four hundred".