256064974 has 16 divisors (see below), whose sum is σ = 419555376. Its totient is φ = 116243200.

The previous prime is 256064971. The next prime is 256064981. The reversal of 256064974 is 479460652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256064974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256064971) 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, 10974 + ... + 25150.

It is an arithmetic number, because the mean of its divisors is an integer number (26222211).

Almost surely, 2^256064974 is an apocalyptic number.

256064974 is a deficient number, since it is larger than the sum of its proper divisors (163490402).

256064974 is a wasteful number, since it uses less digits than its factorization.

256064974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15011.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 256064974 is about 16002.0303086827. The cubic root of 256064974 is about 635.0141348870.

The spelling of 256064974 in words is "two hundred fifty-six million, sixty-four thousand, nine hundred seventy-four".