561361634 has 4 divisors (see below), whose sum is σ = 842042454. Its totient is φ = 280680816.

The previous prime is 561361583. The next prime is 561361673. The reversal of 561361634 is 436163165.

561361634 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 an emirpimes, since its reverse is a distinct semiprime: 436163165 = 5 ⋅87232633.

It can be written as a sum of positive squares in only one way, i.e., 560032225 + 1329409 = 23665^2 + 1153^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 561361594 and 561361603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140340407 + ... + 140340410.

Almost surely, 2^561361634 is an apocalyptic number.

561361634 is a deficient number, since it is larger than the sum of its proper divisors (280680820).

561361634 is a wasteful number, since it uses less digits than its factorization.

561361634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280680819.

The product of its digits is 38880, while the sum is 35.

The square root of 561361634 is about 23693.0714344932. The cubic root of 561361634 is about 824.9245766371.

The spelling of 561361634 in words is "five hundred sixty-one million, three hundred sixty-one thousand, six hundred thirty-four".