28561508855 has 8 divisors (see below), whose sum is σ = 37389611664. Its totient is φ = 20772006400.

The previous prime is 28561508831. The next prime is 28561508867. The reversal of 28561508855 is 55880516582.

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

It is not a de Polignac number, because 28561508855 - 2¹⁴ = 28561492471 is a prime.

It is a super-2 number, since 2×28561508855² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28561508797 and 28561508806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259650026 + ... + 259650135.

It is an arithmetic number, because the mean of its divisors is an integer number (4673701458).

Almost surely, 2^28561508855 is an apocalyptic number.

28561508855 is a deficient number, since it is larger than the sum of its proper divisors (8828102809).

28561508855 is a wasteful number, since it uses less digits than its factorization.

28561508855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519300177.

The product of its (nonzero) digits is 3840000, while the sum is 53.

The spelling of 28561508855 in words is "twenty-eight billion, five hundred sixty-one million, five hundred eight thousand, eight hundred fifty-five".