16864686676 has 6 divisors (see below), whose sum is σ = 29513201690. Its totient is φ = 8432343336.

The previous prime is 16864686649. The next prime is 16864686679. The reversal of 16864686676 is 67668646861.

It can be written as a sum of positive squares in only one way, i.e., 16454219076 + 410467600 = 128274^2 + 20260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16864686679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2108085831 + ... + 2108085838.

Almost surely, 2^16864686676 is an apocalyptic number.

It is an amenable number.

16864686676 is a deficient number, since it is larger than the sum of its proper divisors (12648515014).

16864686676 is a wasteful number, since it uses less digits than its factorization.

16864686676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216171673 (or 4216171671 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 64.

The spelling of 16864686676 in words is "sixteen billion, eight hundred sixty-four million, six hundred eighty-six thousand, six hundred seventy-six".