256800881784 has 16 divisors (see below), whose sum is σ = 642002204520. Its totient is φ = 85600293920.

The previous prime is 256800881761. The next prime is 256800881789. The reversal of 256800881784 is 487188008652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256800881789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350018347 + ... + 5350018394.

Almost surely, 2^256800881784 is an apocalyptic number.

256800881784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256800881784 is an abundant number, since it is smaller than the sum of its proper divisors (385201322736).

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

256800881784 is a wasteful number, since it uses less digits than its factorization.

256800881784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10700036750 (or 10700036746 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 256800881784 in words is "two hundred fifty-six billion, eight hundred million, eight hundred eighty-one thousand, seven hundred eighty-four".