616344081 has 16 divisors (see below), whose sum is σ = 830674944. Its totient is φ = 406473984.

The previous prime is 616344073. The next prime is 616344083. The reversal of 616344081 is 180443616.

It is not a de Polignac number, because 616344081 - 2³ = 616344073 is a prime.

It is a super-2 number, since 2×616344081² = 759760052367469122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (616344083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139945 + ... + 144281.

It is an arithmetic number, because the mean of its divisors is an integer number (51917184).

Almost surely, 2^616344081 is an apocalyptic number.

It is an amenable number.

616344081 is a deficient number, since it is larger than the sum of its proper divisors (214330863).

616344081 is a wasteful number, since it uses less digits than its factorization.

616344081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 616344081 is about 24826.2780335676. The cubic root of 616344081 is about 851.0225668011.

Adding to 616344081 its reverse (180443616), we get a palindrome (796787697).

The spelling of 616344081 in words is "six hundred sixteen million, three hundred forty-four thousand, eighty-one".