688256256382 has 16 divisors (see below), whose sum is σ = 1102434940800. Its totient is φ = 321543522720.

The previous prime is 688256256379. The next prime is 688256256383. The reversal of 688256256382 is 283652652886.

It is a self number, because there is not a number n which added to its sum of digits gives 688256256382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688256256383) by changing a digit.

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, 191393157 + ... + 191396752.

It is an arithmetic number, because the mean of its divisors is an integer number (68902183800).

Almost surely, 2^688256256382 is an apocalyptic number.

688256256382 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

688256256382 is a deficient number, since it is larger than the sum of its proper divisors (414178684418).

688256256382 is a wasteful number, since it uses less digits than its factorization.

688256256382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382789971.

The product of its digits is 66355200, while the sum is 61.

The spelling of 688256256382 in words is "six hundred eighty-eight billion, two hundred fifty-six million, two hundred fifty-six thousand, three hundred eighty-two".