16985051438 has 4 divisors (see below), whose sum is σ = 25477577160. Its totient is φ = 8492525718.

The previous prime is 16985051423. The next prime is 16985051443. The reversal of 16985051438 is 83415058961.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4246262858 + ... + 4246262861.

It is an arithmetic number, because the mean of its divisors is an integer number (6369394290).

Almost surely, 2^16985051438 is an apocalyptic number.

16985051438 is a deficient number, since it is larger than the sum of its proper divisors (8492525722).

16985051438 is an equidigital number, since it uses as much as digits as its factorization.

16985051438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492525721.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 16985051438 in words is "sixteen billion, nine hundred eighty-five million, fifty-one thousand, four hundred thirty-eight".