31485818112 has 144 divisors (see below), whose sum is σ = 98859220992. Its totient is φ = 8705710080.

The previous prime is 31485818071. The next prime is 31485818129. The reversal of 31485818112 is 21181858413.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72193 + ... + 261119.

It is an arithmetic number, because the mean of its divisors is an integer number (686522368).

Almost surely, 2^31485818112 is an apocalyptic number.

31485818112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31485818112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49429610496).

31485818112 is an abundant number, since it is smaller than the sum of its proper divisors (67373402880).

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

31485818112 is a wasteful number, since it uses less digits than its factorization.

31485818112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188984 (or 188970 counting only the distinct ones).

The product of its digits is 61440, while the sum is 42.

The spelling of 31485818112 in words is "thirty-one billion, four hundred eighty-five million, eight hundred eighteen thousand, one hundred twelve".