209467818668 has 6 divisors (see below), whose sum is σ = 366568682676. Its totient is φ = 104733909332.

The previous prime is 209467818619. The next prime is 209467818671. The reversal of 209467818668 is 866818764902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26183477330 + ... + 26183477337.

It is an arithmetic number, because the mean of its divisors is an integer number (61094780446).

Almost surely, 2^209467818668 is an apocalyptic number.

It is an amenable number.

209467818668 is a deficient number, since it is larger than the sum of its proper divisors (157100864008).

209467818668 is a wasteful number, since it uses less digits than its factorization.

209467818668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52366954671 (or 52366954669 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 209467818668 in words is "two hundred nine billion, four hundred sixty-seven million, eight hundred eighteen thousand, six hundred sixty-eight".