561123000898 has 4 divisors (see below), whose sum is σ = 841684501350. Its totient is φ = 280561500448.

The previous prime is 561123000871. The next prime is 561123000929. The reversal of 561123000898 is 898000321165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 500588795529 + 60534205369 = 707523^2 + 246037^2 .

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 as a sum of consecutive naturals, namely, 140280750223 + ... + 140280750226.

Almost surely, 2^561123000898 is an apocalyptic number.

561123000898 is a deficient number, since it is larger than the sum of its proper divisors (280561500452).

561123000898 is a wasteful number, since it uses less digits than its factorization.

561123000898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280561500451.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 561123000898 in words is "five hundred sixty-one billion, one hundred twenty-three million, eight hundred ninety-eight", and thus it is an aban number.