561166053645 has 16 divisors (see below), whose sum is σ = 945121775040. Its totient is φ = 283536532224.

The previous prime is 561166053601. The next prime is 561166053659. The reversal of 561166053645 is 546350661165.

It is not a de Polignac number, because 561166053645 - 2¹⁶ = 561165988109 is a prime.

It is a super-3 number, since 3×561166053645³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561166053594 and 561166053603.

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, 984501564 + ... + 984502133.

It is an arithmetic number, because the mean of its divisors is an integer number (59070110940).

Almost surely, 2^561166053645 is an apocalyptic number.

It is an amenable number.

561166053645 is a deficient number, since it is larger than the sum of its proper divisors (383955721395).

561166053645 is a wasteful number, since it uses less digits than its factorization.

561166053645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969003724.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 561166053645 in words is "five hundred sixty-one billion, one hundred sixty-six million, fifty-three thousand, six hundred forty-five".