12202656642 has 126 divisors (see below), whose sum is σ = 30280217331. Its totient is φ = 3683714760.

The previous prime is 12202656637. The next prime is 12202656667. The reversal of 12202656642 is 24665620221.

12202656642 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 2 + 6 + 5 + 6 + 642 = 666.

12202656642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6101328321 + 6101328321 = 78111^2 + 78111^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78111.

It is a junction number, because it is equal to n+sod(n) for n = 12202656597 and 12202656606.

It is an unprimeable number.

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 62 ways as a sum of consecutive naturals, for example, 46397803 + ... + 46398065.

Almost surely, 2^12202656642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12202656642

12202656642 is an abundant number, since it is smaller than the sum of its proper divisors (18077560689).

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

12202656642 is an frugal number, since it uses more digits than its factorization.

12202656642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 12202656642 in words is "twelve billion, two hundred two million, six hundred fifty-six thousand, six hundred forty-two".