16857906244 has 9 divisors (see below), whose sum is σ = 29501790367. Its totient is φ = 8428823284.

The previous prime is 16857906211. The next prime is 16857906271. The reversal of 16857906244 is 44260975861.

The square root of 16857906244 is 129838.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16857906191 and 16857906200.

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, 227217 + ... + 292135.

Almost surely, 2^16857906244 is an apocalyptic number.

16857906244 is the 129838-th square number.

It is an amenable number.

16857906244 is a deficient number, since it is larger than the sum of its proper divisors (12643884123).

16857906244 is an frugal number, since it uses more digits than its factorization.

16857906244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129842 (or 64921 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 16857906244 in words is "sixteen billion, eight hundred fifty-seven million, nine hundred six thousand, two hundred forty-four".