561644424446165 has 16 divisors (see below), whose sum is σ = 688768702272000. Its totient is φ = 439464598024320.

The previous prime is 561644424446129. The next prime is 561644424446269.

561644424446165 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 561644424446165 - 2³⁰ = 561643350704341 is a prime.

It is a super-2 number, since 2×561644424446165² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561644424446098 and 561644424446107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790504040 + ... + 791214209.

It is an arithmetic number, because the mean of its divisors is an integer number (43048043892000).

Almost surely, 2^{561644424446165} is an apocalyptic number.

It is an amenable number.

561644424446165 is a deficient number, since it is larger than the sum of its proper divisors (127124277825835).

561644424446165 is a wasteful number, since it uses less digits than its factorization.

561644424446165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581719812.

The product of its digits is 265420800, while the sum is 62.

The spelling of 561644424446165 in words is "five hundred sixty-one trillion, six hundred forty-four billion, four hundred twenty-four million, four hundred forty-six thousand, one hundred sixty-five".