68622528578 has 6 divisors (see below), whose sum is σ = 102934348569. Its totient is φ = 34311079056.

The previous prime is 68622528563. The next prime is 68622528587. The reversal of 68622528578 is 87582522686.

68622528578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 67333503169 + 1289025409 = 259487^2 + 35903^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=185233.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 277850 + ... + 463082.

Almost surely, 2^68622528578 is an apocalyptic number.

68622528578 is a deficient number, since it is larger than the sum of its proper divisors (34311819991).

68622528578 is an frugal number, since it uses more digits than its factorization.

68622528578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370468 (or 185235 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 59.

The spelling of 68622528578 in words is "sixty-eight billion, six hundred twenty-two million, five hundred twenty-eight thousand, five hundred seventy-eight".