616605061 has 4 divisors (see below), whose sum is σ = 620743500. Its totient is φ = 612466624.

The previous prime is 616605013. The next prime is 616605107. The reversal of 616605061 is 160506616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87329025 + 529276036 = 9345^2 + 23006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616605061 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 (616605001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068996 + ... + 2069293.

It is an arithmetic number, because the mean of its divisors is an integer number (155185875).

Almost surely, 2^616605061 is an apocalyptic number.

It is an amenable number.

616605061 is a deficient number, since it is larger than the sum of its proper divisors (4138439).

616605061 is a wasteful number, since it uses less digits than its factorization.

616605061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138438.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 616605061 is about 24831.5336014512. The cubic root of 616605061 is about 851.1426666694.

The spelling of 616605061 in words is "six hundred sixteen million, six hundred five thousand, sixty-one".