561016066081 has 8 divisors (see below), whose sum is σ = 580497079680. Its totient is φ = 541544094672.

The previous prime is 561016066067. The next prime is 561016066129. The reversal of 561016066081 is 180660610165.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 561016066081 - 2⁹ = 561016065569 is a prime.

It is a super-2 number, since 2×561016066081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561016066001) 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, 2134185 + ... + 2382598.

It is an arithmetic number, because the mean of its divisors is an integer number (72562134960).

Almost surely, 2^561016066081 is an apocalyptic number.

It is an amenable number.

561016066081 is a deficient number, since it is larger than the sum of its proper divisors (19481013599).

561016066081 is a wasteful number, since it uses less digits than its factorization.

561016066081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521095.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 561016066081 in words is "five hundred sixty-one billion, sixteen million, sixty-six thousand, eighty-one".