561533111025 has 24 divisors (see below), whose sum is σ = 960415255680. Its totient is φ = 289157279040.

The previous prime is 561533110969. The next prime is 561533111059. The reversal of 561533111025 is 520111335165.

It is not a de Polignac number, because 561533111025 - 2⁶ = 561533110961 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129085897 + ... + 129090246.

It is an arithmetic number, because the mean of its divisors is an integer number (40017302320).

Almost surely, 2^561533111025 is an apocalyptic number.

It is an amenable number.

561533111025 is a deficient number, since it is larger than the sum of its proper divisors (398882144655).

561533111025 is a wasteful number, since it uses less digits than its factorization.

561533111025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258176185 (or 258176180 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 561533111025 in words is "five hundred sixty-one billion, five hundred thirty-three million, one hundred eleven thousand, twenty-five".