561124525421165 has 8 divisors (see below), whose sum is σ = 673364724086040. Its totient is φ = 448889424616512.

The previous prime is 561124525421153. The next prime is 561124525421167.

561124525421165 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 63782297449924 + 497342227971241 = 7986382^2 + 22301171^2 .

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 561124525421165 - 2²⁰ = 561124524372589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561124525421167) 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, 1274222894 + ... + 1274663183.

It is an arithmetic number, because the mean of its divisors is an integer number (84170590510755).

Almost surely, 2^{561124525421165} is an apocalyptic number.

It is an amenable number.

561124525421165 is a deficient number, since it is larger than the sum of its proper divisors (112240198664875).

561124525421165 is a wasteful number, since it uses less digits than its factorization.

561124525421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548930111.

The product of its digits is 2880000, while the sum is 50.

The spelling of 561124525421165 in words is "five hundred sixty-one trillion, one hundred twenty-four billion, five hundred twenty-five million, four hundred twenty-one thousand, one hundred sixty-five".