68577726920 has 16 divisors (see below), whose sum is σ = 154299885660. Its totient is φ = 27431090752.

The previous prime is 68577726883. The next prime is 68577726977. The reversal of 68577726920 is 2962777586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68372836324 + 204890596 = 261482^2 + 14314^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68577726920.

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, 857221547 + ... + 857221626.

Almost surely, 2^68577726920 is an apocalyptic number.

It is an amenable number.

68577726920 is an abundant number, since it is smaller than the sum of its proper divisors (85722158740).

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

68577726920 is a wasteful number, since it uses less digits than its factorization.

68577726920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714443184 (or 1714443180 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 68577726920 in words is "sixty-eight billion, five hundred seventy-seven million, seven hundred twenty-six thousand, nine hundred twenty".