209116696212 has 36 divisors (see below), whose sum is σ = 529085147136. Its totient is φ = 69641660880.

The previous prime is 209116696189. The next prime is 209116696219. The reversal of 209116696212 is 212696611902.

209116696212 is a `hidden beast` number, since 2 + 0 + 9 + 1 + 16 + 6 + 9 + 621 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209116696219) 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, 2622868 + ... + 2701419.

Almost surely, 2^209116696212 is an apocalyptic number.

It is an amenable number.

209116696212 is an abundant number, since it is smaller than the sum of its proper divisors (319968450924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209116696212 is a wasteful number, since it uses less digits than its factorization.

209116696212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325388 (or 5325383 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 209116696212 in words is "two hundred nine billion, one hundred sixteen million, six hundred ninety-six thousand, two hundred twelve".