256374851993828 has 6 divisors (see below), whose sum is σ = 448655990989206. Its totient is φ = 128187425996912.

The previous prime is 256374851993807. The next prime is 256374851993833. The reversal of 256374851993828 is 828399158473652.

It can be written as a sum of positive squares in only one way, i.e., 245911386759844 + 10463465233984 = 15681562^2 + 3234728^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32046856499225 + ... + 32046856499232.

It is an arithmetic number, because the mean of its divisors is an integer number (74775998498201).

Almost surely, 2^{256374851993828} is an apocalyptic number.

It is an amenable number.

256374851993828 is a deficient number, since it is larger than the sum of its proper divisors (192281138995378).

256374851993828 is a wasteful number, since it uses less digits than its factorization.

256374851993828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64093712998461 (or 64093712998459 counting only the distinct ones).

The product of its digits is 6270566400, while the sum is 80.

The spelling of 256374851993828 in words is "two hundred fifty-six trillion, three hundred seventy-four billion, eight hundred fifty-one million, nine hundred ninety-three thousand, eight hundred twenty-eight".