163860611209 has 9 divisors (see below), whose sum is σ = 164380800973. Its totient is φ = 163342066252.

The previous prime is 163860611197. The next prime is 163860611219. The reversal of 163860611209 is 902116068361.

The square root of 163860611209 is 404797.

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

It is a de Polignac number, because none of the positive numbers 2^k-163860611209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163860611219) 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, 227900352 + ... + 227901070.

Almost surely, 2^163860611209 is an apocalyptic number.

163860611209 is the 404797-th square number.

163860611209 is the 202399-th centered octagonal number.

It is an amenable number.

163860611209 is a deficient number, since it is larger than the sum of its proper divisors (520189764).

163860611209 is an frugal number, since it uses more digits than its factorization.

163860611209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 163860611209 in words is "one hundred sixty-three billion, eight hundred sixty million, six hundred eleven thousand, two hundred nine".