68626689872 has 60 divisors (see below), whose sum is σ = 144726104124. Its totient is φ = 31509504000.

The previous prime is 68626689871. The next prime is 68626689917. The reversal of 68626689872 is 27898662686.

It can be written as a sum of positive squares in 6 ways, for example, as 7580140096 + 61046549776 = 87064^2 + 247076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68626689871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456122 + ... + 587622.

Almost surely, 2^68626689872 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 68626689872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72363052062).

68626689872 is an abundant number, since it is smaller than the sum of its proper divisors (76099414252).

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

68626689872 is a wasteful number, since it uses less digits than its factorization.

68626689872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131728 (or 131709 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 68.

The spelling of 68626689872 in words is "sixty-eight billion, six hundred twenty-six million, six hundred eighty-nine thousand, eight hundred seventy-two".