2117206016656 has 20 divisors (see below), whose sum is σ = 4102339550652. Its totient is φ = 1058537745536.

The previous prime is 2117206016641. The next prime is 2117206016677. The reversal of 2117206016656 is 6566106027112.

It can be written as a sum of positive squares in 2 ways, for example, as 903868518400 + 1213337498256 = 950720^2 + 1101516^2 .

It is a super-2 number, since 2×2117206016656² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3810751 + ... + 4330846.

Almost surely, 2^{2117206016656} is an apocalyptic number.

It is an amenable number.

2117206016656 is a deficient number, since it is larger than the sum of its proper divisors (1985133533996).

2117206016656 is a wasteful number, since it uses less digits than its factorization.

2117206016656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157858 (or 8157852 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 2117206016656 in words is "two trillion, one hundred seventeen billion, two hundred six million, sixteen thousand, six hundred fifty-six".