616140043303621 has 2 divisors, whose sum is σ = 616140043303622. Its totient is φ = 616140043303620.

The previous prime is 616140043303613. The next prime is 616140043303751. The reversal of 616140043303621 is 126303340041616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 465511305155521 + 150628738148100 = 21575711^2 + 12273090^2 .

It is a cyclic number.

It is not a de Polignac number, because 616140043303621 - 2³ = 616140043303613 is a prime.

It is a super-2 number, since 2×616140043303621² (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 (616140043303021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308070021651810 + 308070021651811.

It is an arithmetic number, because the mean of its divisors is an integer number (308070021651811).

Almost surely, 2^{616140043303621} is an apocalyptic number.

It is an amenable number.

616140043303621 is a deficient number, since it is larger than the sum of its proper divisors (1).

616140043303621 is an equidigital number, since it uses as much as digits as its factorization.

616140043303621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 616140043303621 in words is "six hundred sixteen trillion, one hundred forty billion, forty-three million, three hundred three thousand, six hundred twenty-one".