31808816808 has 64 divisors (see below), whose sum is σ = 82816560000. Its totient is φ = 10168580352.

The previous prime is 31808816801. The next prime is 31808816813. The reversal of 31808816808 is 80861880813.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31808816801) 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, 49660 + ... + 257067.

It is an arithmetic number, because the mean of its divisors is an integer number (1294008750).

Almost surely, 2^31808816808 is an apocalyptic number.

It is an amenable number.

31808816808 is an abundant number, since it is smaller than the sum of its proper divisors (51007743192).

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

31808816808 is a wasteful number, since it uses less digits than its factorization.

31808816808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306914 (or 306910 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 51.

The spelling of 31808816808 in words is "thirty-one billion, eight hundred eight million, eight hundred sixteen thousand, eight hundred eight".