256406863000 has 32 divisors (see below), whose sum is σ = 599992061760. Its totient is φ = 102562744800.

The previous prime is 256406862991. The next prime is 256406863039. The reversal of 256406863000 is 368604652.

It is a happy number.

256406863000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128202432 + ... + 128204431.

It is an arithmetic number, because the mean of its divisors is an integer number (18749751930).

Almost surely, 2^256406863000 is an apocalyptic number.

256406863000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256406863000 is an abundant number, since it is smaller than the sum of its proper divisors (343585198760).

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

256406863000 is a wasteful number, since it uses less digits than its factorization.

256406863000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256406884 (or 256406870 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 256406863000 in words is "two hundred fifty-six billion, four hundred six million, eight hundred sixty-three thousand".