16650781268 has 12 divisors (see below), whose sum is σ = 31787855232. Its totient is φ = 7568536920.

The previous prime is 16650781261. The next prime is 16650781307. The reversal of 16650781268 is 86218705661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16650781261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189213380 + ... + 189213467.

It is an arithmetic number, because the mean of its divisors is an integer number (2648987936).

Almost surely, 2^16650781268 is an apocalyptic number.

It is an amenable number.

16650781268 is a deficient number, since it is larger than the sum of its proper divisors (15137073964).

16650781268 is a wasteful number, since it uses less digits than its factorization.

16650781268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378426862 (or 378426860 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 16650781268 in words is "sixteen billion, six hundred fifty million, seven hundred eighty-one thousand, two hundred sixty-eight".