561118345 has 4 divisors (see below), whose sum is σ = 673342020. Its totient is φ = 448894672.

The previous prime is 561118339. The next prime is 561118387. The reversal of 561118345 is 543811165.

561118345 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: 543811165 = 5 ⋅108762233.

It can be written as a sum of positive squares in 2 ways, for example, as 145733184 + 415385161 = 12072^2 + 20381^2 .

It is a cyclic number.

It is not a de Polignac number, because 561118345 - 2²⁵ = 527563913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561118345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56111830 + ... + 56111839.

It is an arithmetic number, because the mean of its divisors is an integer number (168335505).

Almost surely, 2^561118345 is an apocalyptic number.

It is an amenable number.

561118345 is a deficient number, since it is larger than the sum of its proper divisors (112223675).

561118345 is a wasteful number, since it uses less digits than its factorization.

561118345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112223674.

The product of its digits is 14400, while the sum is 34.

The square root of 561118345 is about 23687.9366978215. The cubic root of 561118345 is about 824.8053878271.

The spelling of 561118345 in words is "five hundred sixty-one million, one hundred eighteen thousand, three hundred forty-five".