616556069 has 2 divisors, whose sum is σ = 616556070. Its totient is φ = 616556068.

The previous prime is 616556027. The next prime is 616556131. The reversal of 616556069 is 960655616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418816225 + 197739844 = 20465^2 + 14062^2 .

It is a cyclic number.

It is not a de Polignac number, because 616556069 - 2²⁸ = 348120613 is a prime.

It is a super-2 number, since 2×616556069² = 760282772441465522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616556869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308278034 + 308278035.

It is an arithmetic number, because the mean of its divisors is an integer number (308278035).

Almost surely, 2^616556069 is an apocalyptic number.

It is an amenable number.

616556069 is a deficient number, since it is larger than the sum of its proper divisors (1).

616556069 is an equidigital number, since it uses as much as digits as its factorization.

616556069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 616556069 is about 24830.5470942547. The cubic root of 616556069 is about 851.1201237222.

The spelling of 616556069 in words is "six hundred sixteen million, five hundred fifty-six thousand, sixty-nine".