256603042733 has 8 divisors (see below), whose sum is σ = 257792895000. Its totient is φ = 255414938688.

The previous prime is 256603042723. The next prime is 256603042769. The reversal of 256603042733 is 337240306652.

It can be written as a sum of positive squares in 4 ways, for example, as 11763137764 + 244839904969 = 108458^2 + 494813^2 .

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 256603042733 - 2⁶ = 256603042669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256603042723) 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, 142358 + ... + 730391.

It is an arithmetic number, because the mean of its divisors is an integer number (32224111875).

Almost surely, 2^256603042733 is an apocalyptic number.

It is an amenable number.

256603042733 is a deficient number, since it is larger than the sum of its proper divisors (1189852267).

256603042733 is a wasteful number, since it uses less digits than its factorization.

256603042733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874111.

The product of its (nonzero) digits is 544320, while the sum is 41.

The spelling of 256603042733 in words is "two hundred fifty-six billion, six hundred three million, forty-two thousand, seven hundred thirty-three".