16985648242 has 16 divisors (see below), whose sum is σ = 25539276312. Its totient is φ = 8472574080.

The previous prime is 16985648231. The next prime is 16985648359. The reversal of 16985648242 is 24284658961.

It is a Cunningham number, because it is equal to 130329²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 13314621321 + 3671026921 = 115389^2 + 60589^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3001888 + ... + 3007540.

Almost surely, 2^16985648242 is an apocalyptic number.

16985648242 is a deficient number, since it is larger than the sum of its proper divisors (8553628070).

16985648242 is a wasteful number, since it uses less digits than its factorization.

16985648242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973.

The product of its digits is 6635520, while the sum is 55.

The spelling of 16985648242 in words is "sixteen billion, nine hundred eighty-five million, six hundred forty-eight thousand, two hundred forty-two".