561343853 has 8 divisors (see below), whose sum is σ = 654628800. Its totient is φ = 481151580.

The previous prime is 561343813. The next prime is 561343873. The reversal of 561343853 is 358343165.

It is not a de Polignac number, because 561343853 - 2⁶ = 561343789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561343813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817943 + ... + 818628.

It is an arithmetic number, because the mean of its divisors is an integer number (81828600).

Almost surely, 2^561343853 is an apocalyptic number.

It is an amenable number.

561343853 is a deficient number, since it is larger than the sum of its proper divisors (93284947).

561343853 is an equidigital number, since it uses as much as digits as its factorization.

561343853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636592 (or 1636578 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 561343853 is about 23692.6961952413. The cubic root of 561343853 is about 824.9158667801.

The spelling of 561343853 in words is "five hundred sixty-one million, three hundred forty-three thousand, eight hundred fifty-three".