616868909297 has 2 divisors, whose sum is σ = 616868909298. Its totient is φ = 616868909296.

The previous prime is 616868909269. The next prime is 616868909323. The reversal of 616868909297 is 792909868616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589945350241 + 26923559056 = 768079^2 + 164084^2 .

It is a cyclic number.

It is not a de Polignac number, because 616868909297 - 2²⁴ = 616852132081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616868909297.

It is not a weakly prime, because it can be changed into another prime (616868909207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308434454648 + 308434454649.

It is an arithmetic number, because the mean of its divisors is an integer number (308434454649).

Almost surely, 2^616868909297 is an apocalyptic number.

It is an amenable number.

616868909297 is a deficient number, since it is larger than the sum of its proper divisors (1).

616868909297 is an equidigital number, since it uses as much as digits as its factorization.

616868909297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141087744, while the sum is 71.

The spelling of 616868909297 in words is "six hundred sixteen billion, eight hundred sixty-eight million, nine hundred nine thousand, two hundred ninety-seven".