68813826320 has 20 divisors (see below), whose sum is σ = 159992146380. Its totient is φ = 27525530496.

The previous prime is 68813826307. The next prime is 68813826359. The reversal of 68813826320 is 2362831886.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7816681744 + 60997144576 = 88412^2 + 246976^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430086335 + ... + 430086494.

It is an arithmetic number, because the mean of its divisors is an integer number (7999607319).

Almost surely, 2^68813826320 is an apocalyptic number.

It is an amenable number.

68813826320 is an abundant number, since it is smaller than the sum of its proper divisors (91178320060).

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

68813826320 is a wasteful number, since it uses less digits than its factorization.

68813826320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860172842 (or 860172836 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 68813826320 in words is "sixty-eight billion, eight hundred thirteen million, eight hundred twenty-six thousand, three hundred twenty".