256803888620 has 24 divisors (see below), whose sum is σ = 547337246064. Its totient is φ = 101188397376.

The previous prime is 256803888613. The next prime is 256803888631. The reversal of 256803888620 is 26888308652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95821007 + ... + 95823686.

It is an arithmetic number, because the mean of its divisors is an integer number (22805718586).

Almost surely, 2^256803888620 is an apocalyptic number.

256803888620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256803888620 is an abundant number, since it is smaller than the sum of its proper divisors (290533357444).

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

256803888620 is a wasteful number, since it uses less digits than its factorization.

256803888620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191644769 (or 191644767 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 256803888620 in words is "two hundred fifty-six billion, eight hundred three million, eight hundred eighty-eight thousand, six hundred twenty".