608642965561 has 2 divisors, whose sum is σ = 608642965562. Its totient is φ = 608642965560.

The previous prime is 608642965537. The next prime is 608642965573. The reversal of 608642965561 is 165569246806.

608642965561 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., 598486357161 + 10156608400 = 773619^2 + 100780^2 .

It is a cyclic number.

It is not a de Polignac number, because 608642965561 - 2²⁹ = 608106094649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 608642965496 and 608642965505.

It is not a weakly prime, because it can be changed into another prime (608642965961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304321482780 + 304321482781.

It is an arithmetic number, because the mean of its divisors is an integer number (304321482781).

Almost surely, 2^608642965561 is an apocalyptic number.

It is an amenable number.

608642965561 is a deficient number, since it is larger than the sum of its proper divisors (1).

608642965561 is an equidigital number, since it uses as much as digits as its factorization.

608642965561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 608642965561 in words is "six hundred eight billion, six hundred forty-two million, nine hundred sixty-five thousand, five hundred sixty-one".