680625176849 has 2 divisors, whose sum is σ = 680625176850. Its totient is φ = 680625176848.

The previous prime is 680625176801. The next prime is 680625176863. The reversal of 680625176849 is 948671526086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540107406400 + 140517770449 = 734920^2 + 374857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680625176849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680625176791 and 680625176800.

It is not a weakly prime, because it can be changed into another prime (680625176879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340312588424 + 340312588425.

It is an arithmetic number, because the mean of its divisors is an integer number (340312588425).

Almost surely, 2^680625176849 is an apocalyptic number.

It is an amenable number.

680625176849 is a deficient number, since it is larger than the sum of its proper divisors (1).

680625176849 is an equidigital number, since it uses as much as digits as its factorization.

680625176849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 680625176849 in words is "six hundred eighty billion, six hundred twenty-five million, one hundred seventy-six thousand, eight hundred forty-nine".