16857444123 has 48 divisors (see below), whose sum is σ = 26751926656. Its totient is φ = 10165720320.

The previous prime is 16857444113. The next prime is 16857444179. The reversal of 16857444123 is 32144475861.

16857444123 is a `hidden beast` number, since 1 + 6 + 85 + 7 + 444 + 123 = 666.

It is not a de Polignac number, because 16857444123 - 2¹⁷ = 16857313051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16857444113) 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 in 47 ways as a sum of consecutive naturals, for example, 1972686 + ... + 1981212.

Almost surely, 2^16857444123 is an apocalyptic number.

16857444123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16857444123 is a deficient number, since it is larger than the sum of its proper divisors (9894482533).

16857444123 is a wasteful number, since it uses less digits than its factorization.

16857444123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8884 (or 8881 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The spelling of 16857444123 in words is "sixteen billion, eight hundred fifty-seven million, four hundred forty-four thousand, one hundred twenty-three".