1616646313 has 2 divisors, whose sum is σ = 1616646314. Its totient is φ = 1616646312.

The previous prime is 1616646289. The next prime is 1616646319. The reversal of 1616646313 is 3136466161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 916091289 + 700555024 = 30267^2 + 26468^2 .

It is an emirp because it is prime and its reverse (3136466161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1616646313 - 2²⁹ = 1079775401 is a prime.

It is a super-2 number, since 2×1616646313² = 5227090602672987938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616646319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808323156 + 808323157.

It is an arithmetic number, because the mean of its divisors is an integer number (808323157).

Almost surely, 2^1616646313 is an apocalyptic number.

It is an amenable number.

1616646313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616646313 is an equidigital number, since it uses as much as digits as its factorization.

1616646313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 1616646313 is about 40207.5404992646. The cubic root of 1616646313 is about 1173.6492854926.

The spelling of 1616646313 in words is "one billion, six hundred sixteen million, six hundred forty-six thousand, three hundred thirteen".