616718366555693 has 2 divisors, whose sum is σ = 616718366555694. Its totient is φ = 616718366555692.

The previous prime is 616718366555689. The next prime is 616718366555827. The reversal of 616718366555693 is 396555663817616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369290091154084 + 247428275401609 = 19216922^2 + 15729853^2 .

It is a cyclic number.

It is not a de Polignac number, because 616718366555693 - 2² = 616718366555689 is a prime.

It is a super-2 number, since 2×616718366555693² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616718365555693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308359183277846 + 308359183277847.

It is an arithmetic number, because the mean of its divisors is an integer number (308359183277847).

Almost surely, 2^{616718366555693} is an apocalyptic number.

It is an amenable number.

616718366555693 is a deficient number, since it is larger than the sum of its proper divisors (1).

616718366555693 is an equidigital number, since it uses as much as digits as its factorization.

616718366555693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992000, while the sum is 77.

The spelling of 616718366555693 in words is "six hundred sixteen trillion, seven hundred eighteen billion, three hundred sixty-six million, five hundred fifty-five thousand, six hundred ninety-three".