686045062077449 has 2 divisors, whose sum is σ = 686045062077450. Its totient is φ = 686045062077448.

The previous prime is 686045062077437. The next prime is 686045062077451. The reversal of 686045062077449 is 944770260540686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658611895999225 + 27433166078224 = 25663435^2 + 5237668^2 .

It is a cyclic number.

It is not a de Polignac number, because 686045062077449 - 2²⁸ = 686044793641993 is a prime.

Together with 686045062077451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (686045061077449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343022531038724 + 343022531038725.

It is an arithmetic number, because the mean of its divisors is an integer number (343022531038725).

Almost surely, 2^{686045062077449} is an apocalyptic number.

It is an amenable number.

686045062077449 is a deficient number, since it is larger than the sum of its proper divisors (1).

686045062077449 is an equidigital number, since it uses as much as digits as its factorization.

686045062077449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 487710720, while the sum is 68.

The spelling of 686045062077449 in words is "six hundred eighty-six trillion, forty-five billion, sixty-two million, seventy-seven thousand, four hundred forty-nine".