31068721416 has 256 divisors, whose sum is σ = 88310476800. Its totient is φ = 9050628096.

The previous prime is 31068721363. The next prime is 31068721427. The reversal of 31068721416 is 61412786013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133342036 + ... + 133342268.

It is an arithmetic number, because the mean of its divisors is an integer number (344962800).

Almost surely, 2^31068721416 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 31068721416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44155238400).

31068721416 is an abundant number, since it is smaller than the sum of its proper divisors (57241755384).

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

31068721416 is a wasteful number, since it uses less digits than its factorization.

31068721416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 31068721416 in words is "thirty-one billion, sixty-eight million, seven hundred twenty-one thousand, four hundred sixteen".