605005100561 has 4 divisors (see below), whose sum is σ = 606402341412. Its totient is φ = 603607859712.

The previous prime is 605005100533. The next prime is 605005100587. The reversal of 605005100561 is 165001500506.

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 43020982225 + 561984118336 = 207415^2 + 749656^2 .

It is a cyclic number.

It is not a de Polignac number, because 605005100561 - 2¹⁰ = 605005099537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605005120561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698619776 + ... + 698620641.

It is an arithmetic number, because the mean of its divisors is an integer number (151600585353).

Almost surely, 2^605005100561 is an apocalyptic number.

It is an amenable number.

605005100561 is a deficient number, since it is larger than the sum of its proper divisors (1397240851).

605005100561 is a wasteful number, since it uses less digits than its factorization.

605005100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397240850.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 605005100561 in words is "six hundred five billion, five million, one hundred thousand, five hundred sixty-one".