256222133042506 has 8 divisors (see below), whose sum is σ = 388295397497700. Its totient is φ = 126790333876608.

The previous prime is 256222133042429. The next prime is 256222133042591. The reversal of 256222133042506 is 605240331222652.

It can be written as a sum of positive squares in 2 ways, for example, as 250372550617225 + 5849582425281 = 15823165^2 + 2418591^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660366322081 + ... + 660366322468.

Almost surely, 2^{256222133042506} is an apocalyptic number.

256222133042506 is a deficient number, since it is larger than the sum of its proper divisors (132073264455194).

256222133042506 is a wasteful number, since it uses less digits than its factorization.

256222133042506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320732644648.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 256222133042506 in words is "two hundred fifty-six trillion, two hundred twenty-two billion, one hundred thirty-three million, forty-two thousand, five hundred six".