617601611849 has 2 divisors, whose sum is σ = 617601611850. Its totient is φ = 617601611848.

The previous prime is 617601611689. The next prime is 617601611863. The reversal of 617601611849 is 948116106716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520768619449 + 96832992400 = 721643^2 + 311180^2 .

It is a cyclic number.

It is not a de Polignac number, because 617601611849 - 2⁸ = 617601611593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 617601611797 and 617601611806.

It is not a weakly prime, because it can be changed into another prime (617601611899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308800805924 + 308800805925.

It is an arithmetic number, because the mean of its divisors is an integer number (308800805925).

Almost surely, 2^617601611849 is an apocalyptic number.

It is an amenable number.

617601611849 is a deficient number, since it is larger than the sum of its proper divisors (1).

617601611849 is an equidigital number, since it uses as much as digits as its factorization.

617601611849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 617601611849 in words is "six hundred seventeen billion, six hundred one million, six hundred eleven thousand, eight hundred forty-nine".