256122220602 has 8 divisors (see below), whose sum is σ = 512244441216. Its totient is φ = 85374073532.

The previous prime is 256122220553. The next prime is 256122220699. The reversal of 256122220602 is 206022221652.

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

256122220602 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 256122220602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21343518378 + ... + 21343518389.

It is an arithmetic number, because the mean of its divisors is an integer number (64030555152).

Almost surely, 2^256122220602 is an apocalyptic number.

256122220602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256122220602 is a wasteful number, since it uses less digits than its factorization.

256122220602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42687036772.

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 256122220602 in words is "two hundred fifty-six billion, one hundred twenty-two million, two hundred twenty thousand, six hundred two".