561742159 has 4 divisors (see below), whose sum is σ = 612809640. Its totient is φ = 510674680.

The previous prime is 561742147. The next prime is 561742193. The reversal of 561742159 is 951247165.

561742159 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.

It is a cyclic number.

It is not a de Polignac number, because 561742159 - 2⁷ = 561742031 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561742109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25533724 + ... + 25533745.

It is an arithmetic number, because the mean of its divisors is an integer number (153202410).

Almost surely, 2^561742159 is an apocalyptic number.

561742159 is a deficient number, since it is larger than the sum of its proper divisors (51067481).

561742159 is a wasteful number, since it uses less digits than its factorization.

561742159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51067480.

The product of its digits is 75600, while the sum is 40.

The square root of 561742159 is about 23701.1003752990. The cubic root of 561742159 is about 825.1109291916.

The spelling of 561742159 in words is "five hundred sixty-one million, seven hundred forty-two thousand, one hundred fifty-nine".