68791988772 has 576 divisors, whose sum is σ = 215126016000. Its totient is φ = 19160219520.

The previous prime is 68791988761. The next prime is 68791988807. The reversal of 68791988772 is 27788919786.

Its product of digits (170698752) is a multiple of the sum of its prime divisors (147).

It is a self number, because there is not a number n which added to its sum of digits gives 68791988772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 870784629 + ... + 870784707.

Almost surely, 2^68791988772 is an apocalyptic number.

68791988772 is a gapful number since it is divisible by the number (62) 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 68791988772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107563008000).

68791988772 is an abundant number, since it is smaller than the sum of its proper divisors (146334027228).

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

68791988772 is a wasteful number, since it uses less digits than its factorization.

68791988772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 147 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 72.

The spelling of 68791988772 in words is "sixty-eight billion, seven hundred ninety-one million, nine hundred eighty-eight thousand, seven hundred seventy-two".