561001005561 has 8 divisors (see below), whose sum is σ = 772130416384. Its totient is φ = 361936132560.

The previous prime is 561001005557. The next prime is 561001005563. The reversal of 561001005561 is 165500100165.

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

It is not a de Polignac number, because 561001005561 - 2² = 561001005557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561001005563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3016134346 + ... + 3016134531.

It is an arithmetic number, because the mean of its divisors is an integer number (96516302048).

Almost surely, 2^561001005561 is an apocalyptic number.

It is an amenable number.

561001005561 is a deficient number, since it is larger than the sum of its proper divisors (211129410823).

561001005561 is a wasteful number, since it uses less digits than its factorization.

561001005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6032268911.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 561001005561 in words is "five hundred sixty-one billion, one million, five thousand, five hundred sixty-one".