31068825816 has 128 divisors (see below), whose sum is σ = 90132480000. Its totient is φ = 8740690560.

The previous prime is 31068825773. The next prime is 31068825829. The reversal of 31068825816 is 61852886013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15541185 + ... + 15543183.

It is an arithmetic number, because the mean of its divisors is an integer number (704160000).

Almost surely, 2^31068825816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31068825816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45066240000).

31068825816 is an abundant number, since it is smaller than the sum of its proper divisors (59063654184).

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

31068825816 is a wasteful number, since it uses less digits than its factorization.

31068825816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 31068825816 in words is "thirty-one billion, sixty-eight million, eight hundred twenty-five thousand, eight hundred sixteen".