16861149450289 has 9 divisors (see below), whose sum is σ = 16897580333209. Its totient is φ = 16824796969540.

The previous prime is 16861149450199. The next prime is 16861149450293. The reversal of 16861149450289 is 98205494116861.

The square root of 16861149450289 is 4106233.

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

16861149450289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16861149450289 - 2⁷ = 16861149450161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16861149450289.

It is not an unprimeable number, because it can be changed into a prime (16861147450289) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2016156222 + ... + 2016164584.

Almost surely, 2^{16861149450289} is an apocalyptic number.

16861149450289 is the 4106233-rd square number.

16861149450289 is the 2053117-th centered octagonal number.

It is an amenable number.

16861149450289 is a deficient number, since it is larger than the sum of its proper divisors (36430882920).

16861149450289 is an frugal number, since it uses more digits than its factorization.

16861149450289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17708 (or 8854 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 64.

The spelling of 16861149450289 in words is "sixteen trillion, eight hundred sixty-one billion, one hundred forty-nine million, four hundred fifty thousand, two hundred eighty-nine".