561913726 has 8 divisors (see below), whose sum is σ = 919495224. Its totient is φ = 255415320.

The previous prime is 561913721. The next prime is 561913727. The reversal of 561913726 is 627319165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561913721) 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, 12770745 + ... + 12770788.

It is an arithmetic number, because the mean of its divisors is an integer number (114936903).

Almost surely, 2^561913726 is an apocalyptic number.

561913726 is a deficient number, since it is larger than the sum of its proper divisors (357581498).

561913726 is a wasteful number, since it uses less digits than its factorization.

561913726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25541546.

The product of its digits is 68040, while the sum is 40.

The square root of 561913726 is about 23704.7194878995. The cubic root of 561913726 is about 825.1949222924.

The spelling of 561913726 in words is "five hundred sixty-one million, nine hundred thirteen thousand, seven hundred twenty-six".