561345671 has 8 divisors (see below), whose sum is σ = 594806400. Its totient is φ = 528276600.

The previous prime is 561345601. The next prime is 561345677. The reversal of 561345671 is 176543165.

561345671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 561345671 - 2²⁶ = 494236807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561345677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94961 + ... + 100698.

It is an arithmetic number, because the mean of its divisors is an integer number (74350800).

Almost surely, 2^561345671 is an apocalyptic number.

561345671 is a deficient number, since it is larger than the sum of its proper divisors (33460729).

561345671 is a wasteful number, since it uses less digits than its factorization.

561345671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195829.

The product of its digits is 75600, while the sum is 38.

The square root of 561345671 is about 23692.7345614642. The cubic root of 561345671 is about 824.9167573189.

The spelling of 561345671 in words is "five hundred sixty-one million, three hundred forty-five thousand, six hundred seventy-one".