561448018 has 8 divisors (see below), whose sum is σ = 891711612. Its totient is φ = 264210816.

The previous prime is 561447949. The next prime is 561448039. The reversal of 561448018 is 810844165.

It can be written as a sum of positive squares in 2 ways, for example, as 538379209 + 23068809 = 23203^2 + 4803^2 .

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

It is a super-2 number, since 2×561448018² = 630447753832256648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8256555 + ... + 8256622.

Almost surely, 2^561448018 is an apocalyptic number.

561448018 is a deficient number, since it is larger than the sum of its proper divisors (330263594).

561448018 is a wasteful number, since it uses less digits than its factorization.

561448018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16513196.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 561448018 is about 23694.8943445629. The cubic root of 561448018 is about 824.9668884170.

The spelling of 561448018 in words is "five hundred sixty-one million, four hundred forty-eight thousand, eighteen".