256404010322 has 8 divisors (see below), whose sum is σ = 385708039500. Its totient is φ = 127834663824.

The previous prime is 256404010321. The next prime is 256404010337. The reversal of 256404010322 is 223010404652.

It can be written as a sum of positive squares in 2 ways, for example, as 246958308601 + 9445701721 = 496949^2 + 97189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256404010321) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 183669797 + ... + 183671192.

Almost surely, 2^256404010322 is an apocalyptic number.

256404010322 is a deficient number, since it is larger than the sum of its proper divisors (129304029178).

256404010322 is a wasteful number, since it uses less digits than its factorization.

256404010322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367341340.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 256404010322 its reverse (223010404652), we get a palindrome (479414414974).

The spelling of 256404010322 in words is "two hundred fifty-six billion, four hundred four million, ten thousand, three hundred twenty-two".