256782288205 has 8 divisors (see below), whose sum is σ = 310179400704. Its totient is φ = 204065394000.

The previous prime is 256782288179. The next prime is 256782288221. The reversal of 256782288205 is 502882287652.

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

It is not a de Polignac number, because 256782288205 - 2⁵ = 256782288173 is a prime.

It is a Duffinian number.

It is a congruent 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, 170053741 + ... + 170055250.

It is an arithmetic number, because the mean of its divisors is an integer number (38772425088).

Almost surely, 2^256782288205 is an apocalyptic number.

It is an amenable number.

256782288205 is a deficient number, since it is larger than the sum of its proper divisors (53397112499).

256782288205 is a wasteful number, since it uses less digits than its factorization.

256782288205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340109147.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 256782288205 in words is "two hundred fifty-six billion, seven hundred eighty-two million, two hundred eighty-eight thousand, two hundred five".