561463363364165 has 4 divisors (see below), whose sum is σ = 673756036037004. Its totient is φ = 449170690691328.

The previous prime is 561463363364161. The next prime is 561463363364201.

561463363364165 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271067477872129 + 290395885492036 = 16464127^2 + 17041006^2 .

It is a cyclic number.

It is not a de Polignac number, because 561463363364165 - 2² = 561463363364161 is a prime.

It is a super-2 number, since 2×561463363364165² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561463363364098 and 561463363364107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561463363364161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56146336336412 + ... + 56146336336421.

It is an arithmetic number, because the mean of its divisors is an integer number (168439009009251).

Almost surely, 2^{561463363364165} is an apocalyptic number.

It is an amenable number.

561463363364165 is a deficient number, since it is larger than the sum of its proper divisors (112292672672839).

561463363364165 is a wasteful number, since it uses less digits than its factorization.

561463363364165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112292672672838.

The product of its digits is 251942400, while the sum is 62.

The spelling of 561463363364165 in words is "five hundred sixty-one trillion, four hundred sixty-three billion, three hundred sixty-three million, three hundred sixty-four thousand, one hundred sixty-five".