256451579 has 8 divisors (see below), whose sum is σ = 273942000. Its totient is φ = 239228416.

The previous prime is 256451543. The next prime is 256451581. The reversal of 256451579 is 975154652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256451579 - 2²⁴ = 239674363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256451509) 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, 64829 + ... + 68670.

It is an arithmetic number, because the mean of its divisors is an integer number (34242750).

Almost surely, 2^256451579 is an apocalyptic number.

256451579 is a deficient number, since it is larger than the sum of its proper divisors (17490421).

256451579 is a wasteful number, since it uses less digits than its factorization.

256451579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133629.

The product of its digits is 378000, while the sum is 44.

The square root of 256451579 is about 16014.1056259786. The cubic root of 256451579 is about 635.3335540668. Note that the first 3 decimals are identical.

The spelling of 256451579 in words is "two hundred fifty-six million, four hundred fifty-one thousand, five hundred seventy-nine".