256040606 has 4 divisors (see below), whose sum is σ = 384060912. Its totient is φ = 128020302.

The previous prime is 256040597. The next prime is 256040633. The reversal of 256040606 is 606040652.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 64010150 + ... + 64010153.

It is an arithmetic number, because the mean of its divisors is an integer number (96015228).

Almost surely, 2^256040606 is an apocalyptic number.

256040606 is a deficient number, since it is larger than the sum of its proper divisors (128020306).

256040606 is a wasteful number, since it uses less digits than its factorization.

256040606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128020305.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 256040606 is about 16001.2688871852. The cubic root of 256040606 is about 634.9939908911.

The spelling of 256040606 in words is "two hundred fifty-six million, forty thousand, six hundred six".