28160808155561 has 8 divisors (see below), whose sum is σ = 28224329742144. Its totient is φ = 28097346357360.

The previous prime is 28160808155527. The next prime is 28160808155567. The reversal of 28160808155561 is 16555180806182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28160808155561 is a prime.

It is a super-5 number, since 5×28160808155561⁵ (a number of 68 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28160808155497 and 28160808155506.

It is not an unprimeable number, because it can be changed into a prime (28160808155567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14003951 + ... + 15888116.

It is an arithmetic number, because the mean of its divisors is an integer number (3528041217768).

Almost surely, 2^{28160808155561} is an apocalyptic number.

It is an amenable number.

28160808155561 is a deficient number, since it is larger than the sum of its proper divisors (63521586583).

28160808155561 is a wasteful number, since it uses less digits than its factorization.

28160808155561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29894191.

The product of its (nonzero) digits is 4608000, while the sum is 56.

The spelling of 28160808155561 in words is "twenty-eight trillion, one hundred sixty billion, eight hundred eight million, one hundred fifty-five thousand, five hundred sixty-one".