209488912466 has 4 divisors (see below), whose sum is σ = 314233368702. Its totient is φ = 104744456232.

The previous prime is 209488912411. The next prime is 209488912583. The reversal of 209488912466 is 664219884902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161788168441 + 47700744025 = 402229^2 + 218405^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52372228115 + ... + 52372228118.

Almost surely, 2^209488912466 is an apocalyptic number.

209488912466 is a deficient number, since it is larger than the sum of its proper divisors (104744456236).

209488912466 is a wasteful number, since it uses less digits than its factorization.

209488912466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104744456235.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 209488912466 in words is "two hundred nine billion, four hundred eighty-eight million, nine hundred twelve thousand, four hundred sixty-six".