209474828291 has 16 divisors (see below), whose sum is σ = 224024269248. Its totient is φ = 195174144000.

The previous prime is 209474828261. The next prime is 209474828351. The reversal of 209474828291 is 192828474902.

It is a de Polignac number, because none of the positive numbers 2^k-209474828291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209474828261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5761931 + ... + 5798171.

It is an arithmetic number, because the mean of its divisors is an integer number (14001516828).

Almost surely, 2^209474828291 is an apocalyptic number.

209474828291 is a deficient number, since it is larger than the sum of its proper divisors (14549440957).

209474828291 is a wasteful number, since it uses less digits than its factorization.

209474828291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39662.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 209474828291 in words is "two hundred nine billion, four hundred seventy-four million, eight hundred twenty-eight thousand, two hundred ninety-one".