209843612082 has 48 divisors (see below), whose sum is σ = 492532436760. Its totient is φ = 64567253088.

The previous prime is 209843612057. The next prime is 209843612101. The reversal of 209843612082 is 280216348902.

209843612082 is a `hidden beast` number, since 2 + 0 + 9 + 8 + 436 + 1 + 208 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4055269761 + 205788342321 = 63681^2 + 453639^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2613613 + ... + 2692704.

Almost surely, 2^209843612082 is an apocalyptic number.

209843612082 is an abundant number, since it is smaller than the sum of its proper divisors (282688824678).

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

209843612082 is a wasteful number, since it uses less digits than its factorization.

209843612082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306364 (or 5306335 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 209843612082 in words is "two hundred nine billion, eight hundred forty-three million, six hundred twelve thousand, eighty-two".