616247333621 has 2 divisors, whose sum is σ = 616247333622. Its totient is φ = 616247333620.

The previous prime is 616247333549. The next prime is 616247333633. The reversal of 616247333621 is 126333742616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602658768721 + 13588564900 = 776311^2 + 116570^2 .

It is a cyclic number.

It is not a de Polignac number, because 616247333621 - 2¹⁸ = 616247071477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616247332621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308123666810 + 308123666811.

It is an arithmetic number, because the mean of its divisors is an integer number (308123666811).

Almost surely, 2^616247333621 is an apocalyptic number.

It is an amenable number.

616247333621 is a deficient number, since it is larger than the sum of its proper divisors (1).

616247333621 is an equidigital number, since it uses as much as digits as its factorization.

616247333621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 44.

The spelling of 616247333621 in words is "six hundred sixteen billion, two hundred forty-seven million, three hundred thirty-three thousand, six hundred twenty-one".