616644450271 has 2 divisors, whose sum is σ = 616644450272. Its totient is φ = 616644450270.

The previous prime is 616644450241. The next prime is 616644450299. The reversal of 616644450271 is 172054446616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616644450271 - 2²⁷ = 616510232543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616644450241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308322225135 + 308322225136.

It is an arithmetic number, because the mean of its divisors is an integer number (308322225136).

Almost surely, 2^616644450271 is an apocalyptic number.

616644450271 is a deficient number, since it is larger than the sum of its proper divisors (1).

616644450271 is an equidigital number, since it uses as much as digits as its factorization.

616644450271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 46.

Adding to 616644450271 its reverse (172054446616), we get a palindrome (788698896887).

The spelling of 616644450271 in words is "six hundred sixteen billion, six hundred forty-four million, four hundred fifty thousand, two hundred seventy-one".