256609594073 has 8 divisors (see below), whose sum is σ = 293299923840. Its totient is φ = 219927218400.

The previous prime is 256609594069. The next prime is 256609594091. The reversal of 256609594073 is 370495906652.

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 256609594073 - 2² = 256609594069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256609594063) 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, 1919228 + ... + 2048573.

It is an arithmetic number, because the mean of its divisors is an integer number (36662490480).

Almost surely, 2^256609594073 is an apocalyptic number.

It is an amenable number.

256609594073 is a deficient number, since it is larger than the sum of its proper divisors (36690329767).

256609594073 is an equidigital number, since it uses as much as digits as its factorization.

256609594073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977047.

The product of its (nonzero) digits is 12247200, while the sum is 56.

The spelling of 256609594073 in words is "two hundred fifty-six billion, six hundred nine million, five hundred ninety-four thousand, seventy-three".