616561607 has 2 divisors, whose sum is σ = 616561608. Its totient is φ = 616561606.

The previous prime is 616561601. The next prime is 616561613. The reversal of 616561607 is 706165616.

It is a balanced prime because it is at equal distance from previous prime (616561601) and next prime (616561613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616561607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616561601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308280803 + 308280804.

It is an arithmetic number, because the mean of its divisors is an integer number (308280804).

Almost surely, 2^616561607 is an apocalyptic number.

616561607 is a deficient number, since it is larger than the sum of its proper divisors (1).

616561607 is an equidigital number, since it uses as much as digits as its factorization.

616561607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 616561607 is about 24830.6586098718. The cubic root of 616561607 is about 851.1226720112.

The spelling of 616561607 in words is "six hundred sixteen million, five hundred sixty-one thousand, six hundred seven".