209796948863 has 12 divisors (see below), whose sum is σ = 229055234040. Its totient is φ = 191901373776.

The previous prime is 209796948797. The next prime is 209796948877. The reversal of 209796948863 is 368849697902.

It is not a de Polignac number, because 209796948863 - 2¹⁰ = 209796947839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209796948883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10009445 + ... + 10030382.

It is an arithmetic number, because the mean of its divisors is an integer number (19087936170).

Almost surely, 2^209796948863 is an apocalyptic number.

209796948863 is a deficient number, since it is larger than the sum of its proper divisors (19258285177).

209796948863 is a wasteful number, since it uses less digits than its factorization.

209796948863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20039894 (or 20039875 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 71.

The spelling of 209796948863 in words is "two hundred nine billion, seven hundred ninety-six million, nine hundred forty-eight thousand, eight hundred sixty-three".