31808286481812 has 48 divisors (see below), whose sum is σ = 78416045870400. Its totient is φ = 10007381053440.

The previous prime is 31808286481733. The next prime is 31808286481819. The reversal of 31808286481812 is 21818468280813.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31808286481819) 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, 259250989 + ... + 259373652.

It is an arithmetic number, because the mean of its divisors is an integer number (1633667622300).

Almost surely, 2^{31808286481812} is an apocalyptic number.

It is an amenable number.

31808286481812 is an abundant number, since it is smaller than the sum of its proper divisors (46607759388588).

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

31808286481812 is a wasteful number, since it uses less digits than its factorization.

31808286481812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518624936 (or 518624934 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 60.

The spelling of 31808286481812 in words is "thirty-one trillion, eight hundred eight billion, two hundred eighty-six million, four hundred eighty-one thousand, eight hundred twelve".