616247333549 has 2 divisors, whose sum is σ = 616247333550. Its totient is φ = 616247333548.

The previous prime is 616247333501. The next prime is 616247333621. The reversal of 616247333549 is 945333742616.

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., 565869531049 + 50377802500 = 752243^2 + 224450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616247333549 is a prime.

It is a super-2 number, since 2×616247333549² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 616247333549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616247332549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308123666774 + 308123666775.

It is an arithmetic number, because the mean of its divisors is an integer number (308123666775).

Almost surely, 2^616247333549 is an apocalyptic number.

It is an amenable number.

616247333549 is a deficient number, since it is larger than the sum of its proper divisors (1).

616247333549 is an equidigital number, since it uses as much as digits as its factorization.

616247333549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 53.

The spelling of 616247333549 in words is "six hundred sixteen billion, two hundred forty-seven million, three hundred thirty-three thousand, five hundred forty-nine".