209073217744 has 20 divisors (see below), whose sum is σ = 405086830596. Its totient is φ = 104534680832.

The previous prime is 209073217609. The next prime is 209073217751. The reversal of 209073217744 is 447712370902.

It can be written as a sum of positive squares in 2 ways, for example, as 207480250000 + 1592967744 = 455500^2 + 39912^2 .

It is a super-2 number, since 2×209073217744² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209073217694 and 209073217703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238652 + ... + 1397284.

Almost surely, 2^209073217744 is an apocalyptic number.

It is an amenable number.

209073217744 is a deficient number, since it is larger than the sum of its proper divisors (196013612852).

209073217744 is a wasteful number, since it uses less digits than its factorization.

209073217744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241014 (or 241008 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 209073217744 in words is "two hundred nine billion, seventy-three million, two hundred seventeen thousand, seven hundred forty-four".