256240930870 has 32 divisors (see below), whose sum is σ = 463746074400. Its totient is φ = 101939026176.

The previous prime is 256240930837. The next prime is 256240930889. The reversal of 256240930870 is 78039042652.

It is a self number, because there is not a number n which added to its sum of digits gives 256240930870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2086021 + ... + 2205439.

It is an arithmetic number, because the mean of its divisors is an integer number (14492064825).

Almost surely, 2^256240930870 is an apocalyptic number.

256240930870 is a deficient number, since it is larger than the sum of its proper divisors (207505143530).

256240930870 is a wasteful number, since it uses less digits than its factorization.

256240930870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120592.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 256240930870 in words is "two hundred fifty-six billion, two hundred forty million, nine hundred thirty thousand, eight hundred seventy".