256564222510134 has 64 divisors (see below), whose sum is σ = 639746915028480. Its totient is φ = 66639811941120.

The previous prime is 256564222510121. The next prime is 256564222510207. The reversal of 256564222510134 is 431015222465652.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 147673522 + ... + 149400794.

It is an arithmetic number, because the mean of its divisors is an integer number (9996045547320).

Almost surely, 2^{256564222510134} is an apocalyptic number.

256564222510134 is an abundant number, since it is smaller than the sum of its proper divisors (383182692518346).

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

256564222510134 is a wasteful number, since it uses less digits than its factorization.

256564222510134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048805.

The product of its (nonzero) digits is 3456000, while the sum is 48.

Adding to 256564222510134 its reverse (431015222465652), we get a palindrome (687579444975786).

The spelling of 256564222510134 in words is "two hundred fifty-six trillion, five hundred sixty-four billion, two hundred twenty-two million, five hundred ten thousand, one hundred thirty-four".