256603623 has 8 divisors (see below), whose sum is σ = 342305136. Its totient is φ = 170985600.

The previous prime is 256603619. The next prime is 256603631. The reversal of 256603623 is 326306652.

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

It is not a de Polignac number, because 256603623 - 2² = 256603619 is a prime.

It is a super-2 number, since 2×256603623² = 131690838673452258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256603693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13308 + ... + 26273.

It is an arithmetic number, because the mean of its divisors is an integer number (42788142).

Almost surely, 2^256603623 is an apocalyptic number.

256603623 is a deficient number, since it is larger than the sum of its proper divisors (85701513).

256603623 is a wasteful number, since it uses less digits than its factorization.

256603623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41745.

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 256603623 is about 16018.8521124330. The cubic root of 256603623 is about 635.4590872782.

The spelling of 256603623 in words is "two hundred fifty-six million, six hundred three thousand, six hundred twenty-three".