845914047617 has 2 divisors, whose sum is σ = 845914047618. Its totient is φ = 845914047616.

The previous prime is 845914047607. The next prime is 845914047619. The reversal of 845914047617 is 716740419548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560163930481 + 285750117136 = 748441^2 + 534556^2 .

It is a cyclic number.

It is not a de Polignac number, because 845914047617 - 2²⁴ = 845897270401 is a prime.

It is a super-2 number, since 2×845914047617² (a number of 25 digits) contains 22 as substring.

Together with 845914047619, 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 (845914047619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422957023808 + 422957023809.

It is an arithmetic number, because the mean of its divisors is an integer number (422957023809).

Almost surely, 2^845914047617 is an apocalyptic number.

It is an amenable number.

845914047617 is a deficient number, since it is larger than the sum of its proper divisors (1).

845914047617 is an equidigital number, since it uses as much as digits as its factorization.

845914047617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 845914047617 in words is "eight hundred forty-five billion, nine hundred fourteen million, forty-seven thousand, six hundred seventeen".