256406863002 has 8 divisors (see below), whose sum is σ = 512813726016. Its totient is φ = 85468954332.

The previous prime is 256406862991. The next prime is 256406863039. The reversal of 256406863002 is 200368604652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

256406863002 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21367238578 + ... + 21367238589.

It is an arithmetic number, because the mean of its divisors is an integer number (64101715752).

Almost surely, 2^256406863002 is an apocalyptic number.

256406863002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256406863002 is a wasteful number, since it uses less digits than its factorization.

256406863002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42734477172.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 256406863002 in words is "two hundred fifty-six billion, four hundred six million, eight hundred sixty-three thousand, two".