209306075144 has 16 divisors (see below), whose sum is σ = 392488017900. Its totient is φ = 104642603712.

The previous prime is 209306075141. The next prime is 209306075183. The reversal of 209306075144 is 441570603902.

It can be written as a sum of positive squares in 2 ways, for example, as 177461672644 + 31844402500 = 421262^2 + 178450^2 .

It is not an unprimeable number, because it can be changed into a prime (209306075141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218647 + ... + 1379750.

Almost surely, 2^209306075144 is an apocalyptic number.

It is an amenable number.

209306075144 is a deficient number, since it is larger than the sum of its proper divisors (183181942756).

209306075144 is a wasteful number, since it uses less digits than its factorization.

209306075144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608472 (or 2608468 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 209306075144 in words is "two hundred nine billion, three hundred six million, seventy-five thousand, one hundred forty-four".