28352105561 has 8 divisors (see below), whose sum is σ = 30557737224. Its totient is φ = 26150002560.

The previous prime is 28352105503. The next prime is 28352105563. The reversal of 28352105561 is 16550125382.

It can be written as a sum of positive squares in 4 ways, for example, as 8645280400 + 19706825161 = 92980^2 + 140381^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28352105561 - 2¹⁰ = 28352104537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28352105563) by changing a digit.

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, 865460 + ... + 897621.

It is an arithmetic number, because the mean of its divisors is an integer number (3819717153).

Almost surely, 2^28352105561 is an apocalyptic number.

It is an amenable number.

28352105561 is a deficient number, since it is larger than the sum of its proper divisors (2205631663).

28352105561 is a wasteful number, since it uses less digits than its factorization.

28352105561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764331.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 28352105561 in words is "twenty-eight billion, three hundred fifty-two million, one hundred five thousand, five hundred sixty-one".