209975343756676 has 9 divisors (see below), whose sum is σ = 367456902291031. Its totient is φ = 104987657387812.

The previous prime is 209975343756637. The next prime is 209975343756767. The reversal of 209975343756676 is 676657343579902.

The square root of 209975343756676 is 14490526.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 209975343756596 and 209975343756605.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25358421 + ... + 32603683.

Almost surely, 2^{209975343756676} is an apocalyptic number.

209975343756676 is the 14490526-th square number.

It is an amenable number.

209975343756676 is a deficient number, since it is larger than the sum of its proper divisors (157481558534355).

209975343756676 is an frugal number, since it uses more digits than its factorization.

209975343756676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490530 (or 7245265 counting only the distinct ones).

The product of its (nonzero) digits is 10802030400, while the sum is 79.

The spelling of 209975343756676 in words is "two hundred nine trillion, nine hundred seventy-five billion, three hundred forty-three million, seven hundred fifty-six thousand, six hundred seventy-six".