561117228389 has 4 divisors (see below), whose sum is σ = 576282558924. Its totient is φ = 545951897856.

The previous prime is 561117228361. The next prime is 561117228439. The reversal of 561117228389 is 983822711165.

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 491201936164 + 69915292225 = 700858^2 + 264415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561117228389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561117228389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561117221389) 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, 7582665212 + ... + 7582665285.

It is an arithmetic number, because the mean of its divisors is an integer number (144070639731).

Almost surely, 2^561117228389 is an apocalyptic number.

It is an amenable number.

561117228389 is a deficient number, since it is larger than the sum of its proper divisors (15165330535).

561117228389 is a wasteful number, since it uses less digits than its factorization.

561117228389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15165330534.

The product of its digits is 1451520, while the sum is 53.

The spelling of 561117228389 in words is "five hundred sixty-one billion, one hundred seventeen million, two hundred twenty-eight thousand, three hundred eighty-nine".