561516573 has 4 divisors (see below), whose sum is σ = 748688768. Its totient is φ = 374344380.

The previous prime is 561516563. The next prime is 561516583. The reversal of 561516573 is 375615165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (561516563) and next prime (561516583).

It is not a de Polignac number, because 561516573 - 2⁵ = 561516541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561516533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93586093 + ... + 93586098.

It is an arithmetic number, because the mean of its divisors is an integer number (187172192).

Almost surely, 2^561516573 is an apocalyptic number.

It is an amenable number.

561516573 is a deficient number, since it is larger than the sum of its proper divisors (187172195).

561516573 is a wasteful number, since it uses less digits than its factorization.

561516573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187172194.

The product of its digits is 94500, while the sum is 39.

The square root of 561516573 is about 23696.3409200661. The cubic root of 561516573 is about 825.0004642789. Note that the first 3 decimals are identical.

The spelling of 561516573 in words is "five hundred sixty-one million, five hundred sixteen thousand, five hundred seventy-three".