256348354495880 has 32 divisors (see below), whose sum is σ = 577441475913240. Its totient is φ = 102422421212160.

The previous prime is 256348354495879. The next prime is 256348354495889. The reversal of 256348354495880 is 88594453843652.

It can be written as a sum of positive squares in 4 ways, for example, as 241004697754276 + 15343656741604 = 15524326^2 + 3917098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256348354495798 and 256348354495807.

It is not an unprimeable number, because it can be changed into a prime (256348354495889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653732801 + ... + 3653802960.

Almost surely, 2^{256348354495880} is an apocalyptic number.

256348354495880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256348354495880 is an abundant number, since it is smaller than the sum of its proper divisors (321093121417360).

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

256348354495880 is a wasteful number, since it uses less digits than its factorization.

256348354495880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307536649 (or 7307536645 counting only the distinct ones).

The product of its (nonzero) digits is 3981312000, while the sum is 74.

The spelling of 256348354495880 in words is "two hundred fifty-six trillion, three hundred forty-eight billion, three hundred fifty-four million, four hundred ninety-five thousand, eight hundred eighty".