656222222656 has 112 divisors (see below), whose sum is σ = 1748396442240. Its totient is φ = 236003973120.

The previous prime is 656222222651. The next prime is 656222222671.

656222222656 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656222222651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5057551 + ... + 5185678.

It is an arithmetic number, because the mean of its divisors is an integer number (15610682520).

Almost surely, 2^656222222656 is an apocalyptic number.

It is an amenable number.

656222222656 is an abundant number, since it is smaller than the sum of its proper divisors (1092174219584).

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

656222222656 is a wasteful number, since it uses less digits than its factorization.

656222222656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243272 (or 10243262 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

It can be divided in two parts, 656222 and 222656, that added together give a palindrome (878878).

The spelling of 656222222656 in words is "six hundred fifty-six billion, two hundred twenty-two million, two hundred twenty-two thousand, six hundred fifty-six".