256154563 has 8 divisors (see below), whose sum is σ = 293241600. Its totient is φ = 219190920.

The previous prime is 256154557. The next prime is 256154579. The reversal of 256154563 is 365451652.

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 256154563 - 2⁵ = 256154531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256154533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26353 + ... + 34738.

It is an arithmetic number, because the mean of its divisors is an integer number (36655200).

Almost surely, 2^256154563 is an apocalyptic number.

256154563 is a deficient number, since it is larger than the sum of its proper divisors (37087037).

256154563 is an equidigital number, since it uses as much as digits as its factorization.

256154563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61697.

The product of its digits is 108000, while the sum is 37.

The square root of 256154563 is about 16004.8293649136. The cubic root of 256154563 is about 635.0881833430.

The spelling of 256154563 in words is "two hundred fifty-six million, one hundred fifty-four thousand, five hundred sixty-three".