256222060656 has 40 divisors (see below), whose sum is σ = 662050126080. Its totient is φ = 85388884416.

The previous prime is 256222060651. The next prime is 256222060693. The reversal of 256222060656 is 656060222652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256222060651) 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, 351976 + ... + 797703.

It is an arithmetic number, because the mean of its divisors is an integer number (16551253152).

Almost surely, 2^256222060656 is an apocalyptic number.

It is an amenable number.

256222060656 is an abundant number, since it is smaller than the sum of its proper divisors (405828065424).

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

256222060656 is a wasteful number, since it uses less digits than its factorization.

256222060656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154333 (or 1154327 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 256222060656 in words is "two hundred fifty-six billion, two hundred twenty-two million, sixty thousand, six hundred fifty-six".