256743561532206 has 64 divisors (see below), whose sum is σ = 589978271416320. Its totient is φ = 72964214557920.

The previous prime is 256743561532187. The next prime is 256743561532219. The reversal of 256743561532206 is 602235165347652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11671836 + ... + 25489583.

It is an arithmetic number, because the mean of its divisors is an integer number (9218410490880).

Almost surely, 2^{256743561532206} is an apocalyptic number.

256743561532206 is an abundant number, since it is smaller than the sum of its proper divisors (333234709884114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256743561532206 is a wasteful number, since it uses less digits than its factorization.

256743561532206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37162309.

The product of its (nonzero) digits is 54432000, while the sum is 57.

The spelling of 256743561532206 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred sixty-one million, five hundred thirty-two thousand, two hundred six".