68840820272 has 160 divisors (see below), whose sum is σ = 163660953600. Its totient is φ = 27381657600.

The previous prime is 68840820271. The next prime is 68840820317. The reversal of 68840820272 is 27202804886.

It is not an unprimeable number, because it can be changed into a prime (68840820271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42837293 + ... + 42838899.

It is an arithmetic number, because the mean of its divisors is an integer number (1022880960).

Almost surely, 2^68840820272 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 68840820272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81830476800).

68840820272 is an abundant number, since it is smaller than the sum of its proper divisors (94820133328).

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

68840820272 is a wasteful number, since it uses less digits than its factorization.

68840820272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The spelling of 68840820272 in words is "sixty-eight billion, eight hundred forty million, eight hundred twenty thousand, two hundred seventy-two".