311278609912 has 16 divisors (see below), whose sum is σ = 583656661800. Its totient is φ = 155636833440.

The previous prime is 311278609903. The next prime is 311278609913. The reversal of 311278609912 is 219906872113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311278609913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296014 + ... + 842722.

Almost surely, 2^311278609912 is an apocalyptic number.

It is an amenable number.

311278609912 is a deficient number, since it is larger than the sum of its proper divisors (272378051888).

311278609912 is a wasteful number, since it uses less digits than its factorization.

311278609912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617886 (or 617882 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 311278609912 in words is "three hundred eleven billion, two hundred seventy-eight million, six hundred nine thousand, nine hundred twelve".