256057673705 has 8 divisors (see below), whose sum is σ = 320628739392. Its totient is φ = 195939785008.

The previous prime is 256057673699. The next prime is 256057673719. The reversal of 256057673705 is 507376750652.

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 256057673705 - 2¹⁰ = 256057672681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113294119 + ... + 1113294348.

It is an arithmetic number, because the mean of its divisors is an integer number (40078592424).

Almost surely, 2^256057673705 is an apocalyptic number.

It is an amenable number.

256057673705 is a deficient number, since it is larger than the sum of its proper divisors (64571065687).

256057673705 is a wasteful number, since it uses less digits than its factorization.

256057673705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226588495.

The product of its (nonzero) digits is 9261000, while the sum is 53.

The spelling of 256057673705 in words is "two hundred fifty-six billion, fifty-seven million, six hundred seventy-three thousand, seven hundred five".