309806209086 has 16 divisors (see below), whose sum is σ = 675940819968. Its totient is φ = 93880669400.

The previous prime is 309806209061. The next prime is 309806209087. The reversal of 309806209086 is 680902608903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309806209087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347016670 + ... + 2347016801.

It is an arithmetic number, because the mean of its divisors is an integer number (42246301248).

Almost surely, 2^309806209086 is an apocalyptic number.

309806209086 is an abundant number, since it is smaller than the sum of its proper divisors (366134610882).

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

309806209086 is a wasteful number, since it uses less digits than its factorization.

309806209086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694033487.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 309806209086 in words is "three hundred nine billion, eight hundred six million, two hundred nine thousand, eighty-six".