256507773454444 has 12 divisors (see below), whose sum is σ = 450350781409144. Its totient is φ = 127836121623264.

The previous prime is 256507773454301. The next prime is 256507773454447. The reversal of 256507773454444 is 444454377705652.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 256507773454444.

It is not an unprimeable number, because it can be changed into a prime (256507773454447) 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, 104441274609 + ... + 104441277064.

Almost surely, 2^{256507773454444} is an apocalyptic number.

It is an amenable number.

256507773454444 is a deficient number, since it is larger than the sum of its proper divisors (193843007954700).

256507773454444 is a wasteful number, since it uses less digits than its factorization.

256507773454444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208882551984 (or 208882551982 counting only the distinct ones).

The product of its (nonzero) digits is 1580544000, while the sum is 67.

The spelling of 256507773454444 in words is "two hundred fifty-six trillion, five hundred seven billion, seven hundred seventy-three million, four hundred fifty-four thousand, four hundred forty-four".