311916385816 has 32 divisors (see below), whose sum is σ = 697452791040. Its totient is φ = 127866343968.

The previous prime is 311916385813. The next prime is 311916385897. The reversal of 311916385816 is 618583619113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311916385811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121084266 + ... + 121086841.

It is an arithmetic number, because the mean of its divisors is an integer number (21795399720).

Almost surely, 2^311916385816 is an apocalyptic number.

It is an amenable number.

311916385816 is an abundant number, since it is smaller than the sum of its proper divisors (385536405224).

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

311916385816 is a wasteful number, since it uses less digits than its factorization.

311916385816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242171143 (or 242171139 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The spelling of 311916385816 in words is "three hundred eleven billion, nine hundred sixteen million, three hundred eighty-five thousand, eight hundred sixteen".