561065671 has 4 divisors (see below), whose sum is σ = 594069552. Its totient is φ = 528061792.

The previous prime is 561065651. The next prime is 561065693. The reversal of 561065671 is 176560165.

561065671 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 561065671 - 2⁹ = 561065159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561065671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561065651) 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, 16501915 + ... + 16501948.

It is an arithmetic number, because the mean of its divisors is an integer number (148517388).

Almost surely, 2^561065671 is an apocalyptic number.

561065671 is a deficient number, since it is larger than the sum of its proper divisors (33003881).

561065671 is a wasteful number, since it uses less digits than its factorization.

561065671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33003880.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561065671 is about 23686.8248399822. The cubic root of 561065671 is about 824.7795779667.

The spelling of 561065671 in words is "five hundred sixty-one million, sixty-five thousand, six hundred seventy-one".