16858519442 has 6 divisors (see below), whose sum is σ = 25288054599. Its totient is φ = 8429167910.

The previous prime is 16858519439. The next prime is 16858519459. The reversal of 16858519442 is 24491585861.

It can be written as a sum of positive squares in only one way, i.e., 8429259721 + 8429259721 = 91811^2 + 91811^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=91811.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 137717 + ... + 229527.

Almost surely, 2^16858519442 is an apocalyptic number.

16858519442 is a deficient number, since it is larger than the sum of its proper divisors (8429535157).

16858519442 is an frugal number, since it uses more digits than its factorization.

16858519442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183624 (or 91813 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 53.

The spelling of 16858519442 in words is "sixteen billion, eight hundred fifty-eight million, five hundred nineteen thousand, four hundred forty-two".