561578536868285 has 8 divisors (see below), whose sum is σ = 686609229982680. Its totient is φ = 440786172334144.

The previous prime is 561578536868243. The next prime is 561578536868309. The reversal of 561578536868285 is 582868635875165.

It can be written as a sum of positive squares in 4 ways, for example, as 17858087129689 + 543720449738596 = 4225883^2 + 23317814^2 .

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 561578536868285 - 2¹⁴ = 561578536851901 is a prime.

It is a super-2 number, since 2×561578536868285² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059582144770 + ... + 1059582145299.

It is an arithmetic number, because the mean of its divisors is an integer number (85826153747835).

Almost surely, 2^{561578536868285} is an apocalyptic number.

It is an amenable number.

561578536868285 is a deficient number, since it is larger than the sum of its proper divisors (125030693114395).

561578536868285 is a wasteful number, since it uses less digits than its factorization.

561578536868285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119164290127.

The product of its digits is 23224320000, while the sum is 83.

The spelling of 561578536868285 in words is "five hundred sixty-one trillion, five hundred seventy-eight billion, five hundred thirty-six million, eight hundred sixty-eight thousand, two hundred eighty-five".