616491559 has 12 divisors (see below), whose sum is σ = 641506008. Its totient is φ = 592129440.

The previous prime is 616491511. The next prime is 616491581. The reversal of 616491559 is 955194616.

It is a happy number.

It is not a de Polignac number, because 616491559 - 2¹⁹ = 615967271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616492559) 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 in 11 ways as a sum of consecutive naturals, for example, 158077 + ... + 161929.

It is an arithmetic number, because the mean of its divisors is an integer number (53458834).

Almost surely, 2^616491559 is an apocalyptic number.

616491559 is a deficient number, since it is larger than the sum of its proper divisors (25014449).

616491559 is an equidigital number, since it uses as much as digits as its factorization.

616491559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018 (or 3957 counting only the distinct ones).

The product of its digits is 291600, while the sum is 46.

The square root of 616491559 is about 24829.2480554688. The cubic root of 616491559 is about 851.0904385743.

The spelling of 616491559 in words is "six hundred sixteen million, four hundred ninety-one thousand, five hundred fifty-nine".