206116643262172 has 6 divisors (see below), whose sum is σ = 360704125708808. Its totient is φ = 103058321631084.

The previous prime is 206116643262163. The next prime is 206116643262217. The reversal of 206116643262172 is 271262346611602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25764580407768 + ... + 25764580407775.

Almost surely, 2^{206116643262172} is an apocalyptic number.

It is an amenable number.

206116643262172 is a deficient number, since it is larger than the sum of its proper divisors (154587482446636).

206116643262172 is a wasteful number, since it uses less digits than its factorization.

206116643262172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51529160815547 (or 51529160815545 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

Adding to 206116643262172 its reverse (271262346611602), we get a palindrome (477378989873774).

The spelling of 206116643262172 in words is "two hundred six trillion, one hundred sixteen billion, six hundred forty-three million, two hundred sixty-two thousand, one hundred seventy-two".