209011005716 has 12 divisors (see below), whose sum is σ = 365940115380. Its totient is φ = 104456687040.

The previous prime is 209011005701. The next prime is 209011005733. The reversal of 209011005716 is 617500110902.

It can be written as a sum of positive squares in 2 ways, for example, as 130896345616 + 78114660100 = 361796^2 + 279490^2 .

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, 12194321 + ... + 12211448.

It is an arithmetic number, because the mean of its divisors is an integer number (30495009615).

Almost surely, 2^209011005716 is an apocalyptic number.

It is an amenable number.

209011005716 is a deficient number, since it is larger than the sum of its proper divisors (156929109664).

209011005716 is a wasteful number, since it uses less digits than its factorization.

209011005716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24407914 (or 24407912 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 209011005716 in words is "two hundred nine billion, eleven million, five thousand, seven hundred sixteen".