561361405134605 has 64 divisors (see below), whose sum is σ = 731957962779648. Its totient is φ = 411678735605760.

The previous prime is 561361405134553. The next prime is 561361405134623. The reversal of 561361405134605 is 506431504163165.

It is a happy number.

It is not a de Polignac number, because 561361405134605 - 2¹⁴ = 561361405118221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10918640879 + ... + 10918692291.

It is an arithmetic number, because the mean of its divisors is an integer number (11436843168432).

Almost surely, 2^{561361405134605} is an apocalyptic number.

It is an amenable number.

561361405134605 is a deficient number, since it is larger than the sum of its proper divisors (170596557645043).

561361405134605 is a wasteful number, since it uses less digits than its factorization.

561361405134605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64646.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 561361405134605 in words is "five hundred sixty-one trillion, three hundred sixty-one billion, four hundred five million, one hundred thirty-four thousand, six hundred five".