680177777173 has 2 divisors, whose sum is σ = 680177777174. Its totient is φ = 680177777172.

The previous prime is 680177777129. The next prime is 680177777197. The reversal of 680177777173 is 371777771086.

680177777173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677515010769 + 2662766404 = 823113^2 + 51602^2 .

It is a cyclic number.

It is not a de Polignac number, because 680177777173 - 2¹³ = 680177768981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680177778173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340088888586 + 340088888587.

It is an arithmetic number, because the mean of its divisors is an integer number (340088888587).

Almost surely, 2^680177777173 is an apocalyptic number.

It is an amenable number.

680177777173 is a deficient number, since it is larger than the sum of its proper divisors (1).

680177777173 is an equidigital number, since it uses as much as digits as its factorization.

680177777173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16941456, while the sum is 61.

The spelling of 680177777173 in words is "six hundred eighty billion, one hundred seventy-seven million, seven hundred seventy-seven thousand, one hundred seventy-three".