68049389616 has 40 divisors (see below), whose sum is σ = 189316893360. Its totient is φ = 20938273536.

The previous prime is 68049389593. The next prime is 68049389659. The reversal of 68049389616 is 61698394086.

It is a super-2 number, since 2×68049389616² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68049389616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54526131 + ... + 54527378.

It is an arithmetic number, because the mean of its divisors is an integer number (4732922334).

Almost surely, 2^68049389616 is an apocalyptic number.

It is an amenable number.

68049389616 is an abundant number, since it is smaller than the sum of its proper divisors (121267503744).

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

68049389616 is a wasteful number, since it uses less digits than its factorization.

68049389616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109053533 (or 109053527 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 68049389616 in words is "sixty-eight billion, forty-nine million, three hundred eighty-nine thousand, six hundred sixteen".