28606841561 has 8 divisors (see below), whose sum is σ = 28792413000. Its totient is φ = 28421655552.

The previous prime is 28606841551. The next prime is 28606841573. The reversal of 28606841561 is 16514860682.

It can be written as a sum of positive squares in 4 ways, for example, as 2743769161 + 25863072400 = 52381^2 + 160820^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-28606841561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28606841521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53315 + ... + 245063.

It is an arithmetic number, because the mean of its divisors is an integer number (3599051625).

Almost surely, 2^28606841561 is an apocalyptic number.

It is an amenable number.

28606841561 is a deficient number, since it is larger than the sum of its proper divisors (185571439).

28606841561 is a wasteful number, since it uses less digits than its factorization.

28606841561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192715.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 28606841561 in words is "twenty-eight billion, six hundred six million, eight hundred forty-one thousand, five hundred sixty-one".