680161778812 has 6 divisors (see below), whose sum is σ = 1190283112928. Its totient is φ = 340080889404.

The previous prime is 680161778801. The next prime is 680161778827. The reversal of 680161778812 is 218877161086.

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, 85020222348 + ... + 85020222355.

Almost surely, 2^680161778812 is an apocalyptic number.

It is an amenable number.

680161778812 is a deficient number, since it is larger than the sum of its proper divisors (510121334116).

680161778812 is a wasteful number, since it uses less digits than its factorization.

680161778812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170040444707 (or 170040444705 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 55.

The spelling of 680161778812 in words is "six hundred eighty billion, one hundred sixty-one million, seven hundred seventy-eight thousand, eight hundred twelve".