561349895 has 8 divisors (see below), whose sum is σ = 685037520. Its totient is φ = 441468160.

The previous prime is 561349879. The next prime is 561349909. The reversal of 561349895 is 598943165.

It is a happy number.

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

It is not a de Polignac number, because 561349895 - 2⁴ = 561349879 is a prime.

It is a super-2 number, since 2×561349895² = 630227409233022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951146 + ... + 951735.

It is an arithmetic number, because the mean of its divisors is an integer number (85629690).

Almost surely, 2^561349895 is an apocalyptic number.

561349895 is a deficient number, since it is larger than the sum of its proper divisors (123687625).

561349895 is a wasteful number, since it uses less digits than its factorization.

561349895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902945.

The product of its digits is 1166400, while the sum is 50.

The square root of 561349895 is about 23692.8237025476. The cubic root of 561349895 is about 824.9188264181.

The spelling of 561349895 in words is "five hundred sixty-one million, three hundred forty-nine thousand, eight hundred ninety-five".