309555594812 has 12 divisors (see below), whose sum is σ = 573588308160. Its totient is φ = 145673221056.

The previous prime is 309555594763. The next prime is 309555594827. The reversal of 309555594812 is 218495555903.

It is a happy number.

It is a super-2 number, since 2×309555594812² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2276144012 + ... + 2276144147.

It is an arithmetic number, because the mean of its divisors is an integer number (47799025680).

Almost surely, 2^309555594812 is an apocalyptic number.

It is an amenable number.

309555594812 is a deficient number, since it is larger than the sum of its proper divisors (264032713348).

309555594812 is a wasteful number, since it uses less digits than its factorization.

309555594812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552288180 (or 4552288178 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 56.

The spelling of 309555594812 in words is "three hundred nine billion, five hundred fifty-five million, five hundred ninety-four thousand, eight hundred twelve".