256625774 has 4 divisors (see below), whose sum is σ = 384938664. Its totient is φ = 128312886.

The previous prime is 256625773. The next prime is 256625777. The reversal of 256625774 is 477526652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256625771) 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 as a sum of consecutive naturals, namely, 64156442 + ... + 64156445.

It is an arithmetic number, because the mean of its divisors is an integer number (96234666).

Almost surely, 2^256625774 is an apocalyptic number.

256625774 is a deficient number, since it is larger than the sum of its proper divisors (128312890).

256625774 is a wasteful number, since it uses less digits than its factorization.

256625774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128312889.

The product of its digits is 705600, while the sum is 44.

The square root of 256625774 is about 16019.5435016108. The cubic root of 256625774 is about 635.4773718333.

The spelling of 256625774 in words is "two hundred fifty-six million, six hundred twenty-five thousand, seven hundred seventy-four".