68277777812 has 6 divisors (see below), whose sum is σ = 119486111178. Its totient is φ = 34138888904.

The previous prime is 68277777787. The next prime is 68277777833. The reversal of 68277777812 is 21877777286.

It can be written as a sum of positive squares in only one way, i.e., 35195260816 + 33082516996 = 187604^2 + 181886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8534722223 + ... + 8534722230.

It is an arithmetic number, because the mean of its divisors is an integer number (19914351863).

Almost surely, 2^68277777812 is an apocalyptic number.

It is an amenable number.

68277777812 is a deficient number, since it is larger than the sum of its proper divisors (51208333366).

68277777812 is a wasteful number, since it uses less digits than its factorization.

68277777812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17069444457 (or 17069444455 counting only the distinct ones).

The product of its digits is 25815552, while the sum is 62.

The spelling of 68277777812 in words is "sixty-eight billion, two hundred seventy-seven million, seven hundred seventy-seven thousand, eight hundred twelve".