68647221890616 has 128 divisors (see below), whose sum is σ = 180386542068480. Its totient is φ = 21742438265856.

The previous prime is 68647221890593. The next prime is 68647221890627. The reversal of 68647221890616 is 61609812274686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225018615 + ... + 225323481.

It is an arithmetic number, because the mean of its divisors is an integer number (1409269859910).

Almost surely, 2^{68647221890616} 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 68647221890616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90193271034240).

68647221890616 is an abundant number, since it is smaller than the sum of its proper divisors (111739320177864).

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

68647221890616 is a wasteful number, since it uses less digits than its factorization.

68647221890616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310853 (or 310849 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 68647221890616 in words is "sixty-eight trillion, six hundred forty-seven billion, two hundred twenty-one million, eight hundred ninety thousand, six hundred sixteen".