256556126 has 16 divisors (see below), whose sum is σ = 405825360. Its totient is φ = 121305600.

The previous prime is 256556101. The next prime is 256556141. The reversal of 256556126 is 621655652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 256556126.

It is a congruent number.

It is an unprimeable number.

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, 16076 + ... + 27776.

It is an arithmetic number, because the mean of its divisors is an integer number (25364085).

Almost surely, 2^256556126 is an apocalyptic number.

256556126 is a deficient number, since it is larger than the sum of its proper divisors (149269234).

256556126 is a wasteful number, since it uses less digits than its factorization.

256556126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12299.

The product of its digits is 108000, while the sum is 38.

The square root of 256556126 is about 16017.3695093795. The cubic root of 256556126 is about 635.4198773061.

The spelling of 256556126 in words is "two hundred fifty-six million, five hundred fifty-six thousand, one hundred twenty-six".