28560560656556 has 24 divisors (see below), whose sum is σ = 51627147285504. Its totient is φ = 13810552082640.

The previous prime is 28560560656553. The next prime is 28560560656577. The reversal of 28560560656556 is 65565606506582.

It is a super-2 number, since 2×28560560656556² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28560560656492 and 28560560656501.

It is not an unprimeable number, because it can be changed into a prime (28560560656553) 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, 75427400 + ... + 75805103.

It is an arithmetic number, because the mean of its divisors is an integer number (2151131136896).

Almost surely, 2^{28560560656556} is an apocalyptic number.

It is an amenable number.

28560560656556 is a deficient number, since it is larger than the sum of its proper divisors (23066586628948).

28560560656556 is a wasteful number, since it uses less digits than its factorization.

28560560656556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151234061 (or 151234059 counting only the distinct ones).

The product of its (nonzero) digits is 388800000, while the sum is 65.

The spelling of 28560560656556 in words is "twenty-eight trillion, five hundred sixty billion, five hundred sixty million, six hundred fifty-six thousand, five hundred fifty-six".