68252780772 has 72 divisors (see below), whose sum is σ = 188505626400. Its totient is φ = 20650417920.

The previous prime is 68252780737. The next prime is 68252780773. The reversal of 68252780772 is 27708725286.

It is a super-2 number, since 2×68252780772² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (68252780773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120604 + ... + 388652.

It is an arithmetic number, because the mean of its divisors is an integer number (2618133700).

Almost surely, 2^68252780772 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 68252780772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94252813200).

68252780772 is an abundant number, since it is smaller than the sum of its proper divisors (120252845628).

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

68252780772 is a wasteful number, since it uses less digits than its factorization.

68252780772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268713 (or 268708 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 68252780772 in words is "sixty-eight billion, two hundred fifty-two million, seven hundred eighty thousand, seven hundred seventy-two".