256361773800 has 384 divisors, whose sum is σ = 887283745920. Its totient is φ = 60702720000.

The previous prime is 256361773799. The next prime is 256361773819. The reversal of 256361773800 is 8377163652.

It is a self number, because there is not a number n which added to its sum of digits gives 256361773800.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 84300280 + ... + 84303320.

It is an arithmetic number, because the mean of its divisors is an integer number (2310634755).

Almost surely, 2^256361773800 is an apocalyptic number.

256361773800 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 256361773800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443641872960).

256361773800 is an abundant number, since it is smaller than the sum of its proper divisors (630921972120).

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

256361773800 is a wasteful number, since it uses less digits than its factorization.

256361773800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 256361773800 in words is "two hundred fifty-six billion, three hundred sixty-one million, seven hundred seventy-three thousand, eight hundred".