610550605561 has 4 divisors (see below), whose sum is σ = 657516036772. Its totient is φ = 563585174352.

The previous prime is 610550605549. The next prime is 610550605571. The reversal of 610550605561 is 165506055016.

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 308291457600 + 302259147961 = 555240^2 + 549781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-610550605561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610550605571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23482715586 + ... + 23482715611.

It is an arithmetic number, because the mean of its divisors is an integer number (164379009193).

Almost surely, 2^610550605561 is an apocalyptic number.

It is an amenable number.

610550605561 is a deficient number, since it is larger than the sum of its proper divisors (46965431211).

610550605561 is a wasteful number, since it uses less digits than its factorization.

610550605561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46965431210.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 610550605561 in words is "six hundred ten billion, five hundred fifty million, six hundred five thousand, five hundred sixty-one".