256564334212 has 72 divisors (see below), whose sum is σ = 467429901120. Its totient is φ = 123185059200.

The previous prime is 256564334177. The next prime is 256564334227. The reversal of 256564334212 is 212433465652.

256564334212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113072614 + ... + 113074882.

It is an arithmetic number, because the mean of its divisors is an integer number (6492081960).

Almost surely, 2^256564334212 is an apocalyptic number.

It is an amenable number.

256564334212 is a deficient number, since it is larger than the sum of its proper divisors (210865566908).

256564334212 is a wasteful number, since it uses less digits than its factorization.

256564334212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573 (or 2510 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 43.

Adding to 256564334212 its reverse (212433465652), we get a palindrome (468997799864).

The spelling of 256564334212 in words is "two hundred fifty-six billion, five hundred sixty-four million, three hundred thirty-four thousand, two hundred twelve".