680487587020457 has 2 divisors, whose sum is σ = 680487587020458. Its totient is φ = 680487587020456.

The previous prime is 680487587020447. The next prime is 680487587020529. The reversal of 680487587020457 is 754020785784086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522925117413136 + 157562469607321 = 22867556^2 + 12552389^2 .

It is a cyclic number.

It is not a de Polignac number, because 680487587020457 - 2⁴ = 680487587020441 is a prime.

It is not a weakly prime, because it can be changed into another prime (680487587020447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340243793510228 + 340243793510229.

It is an arithmetic number, because the mean of its divisors is an integer number (340243793510229).

Almost surely, 2^{680487587020457} is an apocalyptic number.

It is an amenable number.

680487587020457 is a deficient number, since it is larger than the sum of its proper divisors (1).

680487587020457 is an equidigital number, since it uses as much as digits as its factorization.

680487587020457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 842956800, while the sum is 71.

The spelling of 680487587020457 in words is "six hundred eighty trillion, four hundred eighty-seven billion, five hundred eighty-seven million, twenty thousand, four hundred fifty-seven".