561000050505 has 12 divisors (see below), whose sum is σ = 972400087620. Its totient is φ = 299200026912.

The previous prime is 561000050491. The next prime is 561000050579. The reversal of 561000050505 is 505050000165.

561000050505 is a `hidden beast` number, since 5 + 6 + 100 + 0 + 0 + 50 + 505 = 666.

561000050505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 428026052169 + 132973998336 = 654237^2 + 364656^2 .

It is not a de Polignac number, because 561000050505 - 2⁶ = 561000050441 is a prime.

It is a super-2 number, since 2×561000050505² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6233333850 + ... + 6233333939.

It is an arithmetic number, because the mean of its divisors is an integer number (81033340635).

Almost surely, 2^561000050505 is an apocalyptic number.

It is an amenable number.

561000050505 is a deficient number, since it is larger than the sum of its proper divisors (411400037115).

561000050505 is a wasteful number, since it uses less digits than its factorization.

561000050505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12466667800 (or 12466667797 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 561000050505 in words is "five hundred sixty-one billion, fifty thousand, five hundred five".