610516561 has 4 divisors (see below), whose sum is σ = 611366400. Its totient is φ = 609666724.

The previous prime is 610516549. The next prime is 610516567. The reversal of 610516561 is 165615016.

610516561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-610516561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610516567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423841 + ... + 425278.

It is an arithmetic number, because the mean of its divisors is an integer number (152841600).

Almost surely, 2^610516561 is an apocalyptic number.

It is an amenable number.

610516561 is a deficient number, since it is larger than the sum of its proper divisors (849839).

610516561 is an equidigital number, since it uses as much as digits as its factorization.

610516561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849838.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 610516561 is about 24708.6333292637. The cubic root of 610516561 is about 848.3319356043.

The spelling of 610516561 in words is "six hundred ten million, five hundred sixteen thousand, five hundred sixty-one".