698445085348657 has 2 divisors, whose sum is σ = 698445085348658. Its totient is φ = 698445085348656.

The previous prime is 698445085348601. The next prime is 698445085348739. The reversal of 698445085348657 is 756843580544896.

It is an a-pointer prime, because the next prime (698445085348739) can be obtained adding 698445085348657 to its sum of digits (82).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632403847864881 + 66041237483776 = 25147641^2 + 8126576^2 .

It is a cyclic number.

It is not a de Polignac number, because 698445085348657 - 2⁷ = 698445085348529 is a prime.

It is a super-2 number, since 2×698445085348657² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (698445085348057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349222542674328 + 349222542674329.

It is an arithmetic number, because the mean of its divisors is an integer number (349222542674329).

Almost surely, 2^{698445085348657} is an apocalyptic number.

It is an amenable number.

698445085348657 is a deficient number, since it is larger than the sum of its proper divisors (1).

698445085348657 is an equidigital number, since it uses as much as digits as its factorization.

698445085348657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27869184000, while the sum is 82.

The spelling of 698445085348657 in words is "six hundred ninety-eight trillion, four hundred forty-five billion, eighty-five million, three hundred forty-eight thousand, six hundred fifty-seven".