616643156503603 has 2 divisors, whose sum is σ = 616643156503604. Its totient is φ = 616643156503602.

The previous prime is 616643156503579. The next prime is 616643156503679. The reversal of 616643156503603 is 306305651346616.

616643156503603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616643156503603 - 2³⁷ = 616505717550131 is a prime.

It is not a weakly prime, because it can be changed into another prime (616643156507603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308321578251801 + 308321578251802.

It is an arithmetic number, because the mean of its divisors is an integer number (308321578251802).

Almost surely, 2^{616643156503603} is an apocalyptic number.

616643156503603 is a deficient number, since it is larger than the sum of its proper divisors (1).

616643156503603 is an equidigital number, since it uses as much as digits as its factorization.

616643156503603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20995200, while the sum is 55.

The spelling of 616643156503603 in words is "six hundred sixteen trillion, six hundred forty-three billion, one hundred fifty-six million, five hundred three thousand, six hundred three".