561155941 has 8 divisors (see below), whose sum is σ = 594653400. Its totient is φ = 527712768.

The previous prime is 561155911. The next prime is 561155953. The reversal of 561155941 is 149551165.

561155941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 44275716 + 516880225 = 6654^2 + 22735^2 .

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 561155941 - 2¹⁹ = 560631653 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 561155941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561155911) 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, 8785 + ... + 34633.

It is an arithmetic number, because the mean of its divisors is an integer number (74331675).

Almost surely, 2^561155941 is an apocalyptic number.

It is an amenable number.

561155941 is a deficient number, since it is larger than the sum of its proper divisors (33497459).

561155941 is a wasteful number, since it uses less digits than its factorization.

561155941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27143.

The product of its digits is 27000, while the sum is 37.

The square root of 561155941 is about 23688.7302530127. The cubic root of 561155941 is about 824.8238085941.

The spelling of 561155941 in words is "five hundred sixty-one million, one hundred fifty-five thousand, nine hundred forty-one".