16861650599 has 2 divisors, whose sum is σ = 16861650600. Its totient is φ = 16861650598.

The previous prime is 16861650577. The next prime is 16861650629. The reversal of 16861650599 is 99505616861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16861650599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16861650569) 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, 8430825299 + 8430825300.

It is an arithmetic number, because the mean of its divisors is an integer number (8430825300).

Almost surely, 2^16861650599 is an apocalyptic number.

16861650599 is a deficient number, since it is larger than the sum of its proper divisors (1).

16861650599 is an equidigital number, since it uses as much as digits as its factorization.

16861650599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 16861650599 in words is "sixteen billion, eight hundred sixty-one million, six hundred fifty thousand, five hundred ninety-nine".