256464011522 has 16 divisors (see below), whose sum is σ = 385028206080. Its totient is φ = 128121328368.

The previous prime is 256464011521. The next prime is 256464011563. The reversal of 256464011522 is 225110464652.

It is not an unprimeable number, because it can be changed into a prime (256464011521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12111368 + ... + 12132524.

It is an arithmetic number, because the mean of its divisors is an integer number (24064262880).

Almost surely, 2^256464011522 is an apocalyptic number.

256464011522 is a deficient number, since it is larger than the sum of its proper divisors (128564194558).

256464011522 is a wasteful number, since it uses less digits than its factorization.

256464011522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26105.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 256464011522 in words is "two hundred fifty-six billion, four hundred sixty-four million, eleven thousand, five hundred twenty-two".