28528415161 has 4 divisors (see below), whose sum is σ = 28528845300. Its totient is φ = 28527985024.

The previous prime is 28528415143. The next prime is 28528415233. The reversal of 28528415161 is 16151482582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14084942400 + 14443472761 = 118680^2 + 120181^2 .

It is a cyclic number.

It is not a de Polignac number, because 28528415161 - 2¹⁷ = 28528284089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28528415101) 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 3 ways as a sum of consecutive naturals, for example, 92176 + ... + 256033.

It is an arithmetic number, because the mean of its divisors is an integer number (7132211325).

Almost surely, 2^28528415161 is an apocalyptic number.

It is an amenable number.

28528415161 is a deficient number, since it is larger than the sum of its proper divisors (430139).

28528415161 is an equidigital number, since it uses as much as digits as its factorization.

28528415161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430138.

The product of its digits is 153600, while the sum is 43.

The spelling of 28528415161 in words is "twenty-eight billion, five hundred twenty-eight million, four hundred fifteen thousand, one hundred sixty-one".