17991616708 has 12 divisors (see below), whose sum is σ = 33907277740. Its totient is φ = 8303823072.

The previous prime is 17991616703. The next prime is 17991616717. The reversal of 17991616708 is 80761619971.

It can be written as a sum of positive squares in 2 ways, for example, as 7591288384 + 10400328324 = 87128^2 + 101982^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 172996263 + ... + 172996366.

Almost surely, 2^17991616708 is an apocalyptic number.

It is an amenable number.

17991616708 is a deficient number, since it is larger than the sum of its proper divisors (15915661032).

17991616708 is a wasteful number, since it uses less digits than its factorization.

17991616708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345992646 (or 345992644 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 17991616708 in words is "seventeen billion, nine hundred ninety-one million, six hundred sixteen thousand, seven hundred eight".