311816681620 has 24 divisors (see below), whose sum is σ = 655527600000. Its totient is φ = 124590945312.

The previous prime is 311816681599. The next prime is 311816681639. The reversal of 311816681620 is 26186618113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8464120 + ... + 8500879.

It is an arithmetic number, because the mean of its divisors is an integer number (27313650000).

Almost surely, 2^311816681620 is an apocalyptic number.

It is an amenable number.

311816681620 is an abundant number, since it is smaller than the sum of its proper divisors (343710918380).

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

311816681620 is a wasteful number, since it uses less digits than its factorization.

311816681620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16965927 (or 16965925 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 311816681620 in words is "three hundred eleven billion, eight hundred sixteen million, six hundred eighty-one thousand, six hundred twenty".