305665143212 has 48 divisors (see below), whose sum is σ = 636385344000. Its totient is φ = 126627658560.

The previous prime is 305665143211. The next prime is 305665143253. The reversal of 305665143212 is 212341566503.

It is not an unprimeable number, because it can be changed into a prime (305665143211) 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, 3336962 + ... + 3427337.

It is an arithmetic number, because the mean of its divisors is an integer number (13258028000).

Almost surely, 2^305665143212 is an apocalyptic number.

It is an amenable number.

305665143212 is an abundant number, since it is smaller than the sum of its proper divisors (330720200788).

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

305665143212 is a wasteful number, since it uses less digits than its factorization.

305665143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764406 (or 6764404 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 305665143212 in words is "three hundred five billion, six hundred sixty-five million, one hundred forty-three thousand, two hundred twelve".