17991616706 has 16 divisors (see below), whose sum is σ = 30845025024. Its totient is φ = 7710129504.

The previous prime is 17991616703. The next prime is 17991616717. The reversal of 17991616706 is 60761619971.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (17991616703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194231 + ... + 271493.

It is an arithmetic number, because the mean of its divisors is an integer number (1927814064).

Almost surely, 2^17991616706 is an apocalyptic number.

17991616706 is a deficient number, since it is larger than the sum of its proper divisors (12853408318).

17991616706 is a wasteful number, since it uses less digits than its factorization.

17991616706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93905.

The product of its (nonzero) digits is 857304, while the sum is 53.

The spelling of 17991616706 in words is "seventeen billion, nine hundred ninety-one million, six hundred sixteen thousand, seven hundred six".