28160782817 has 4 divisors (see below), whose sum is σ = 28161450240. Its totient is φ = 28160115396.

The previous prime is 28160782799. The next prime is 28160782841. The reversal of 28160782817 is 71828706182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28160782817 - 2¹² = 28160778721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28160782847) 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, 265817 + ... + 356342.

It is an arithmetic number, because the mean of its divisors is an integer number (7040362560).

Almost surely, 2^28160782817 is an apocalyptic number.

It is an amenable number.

28160782817 is a deficient number, since it is larger than the sum of its proper divisors (667423).

28160782817 is an equidigital number, since it uses as much as digits as its factorization.

28160782817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667422.

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 28160782817 in words is "twenty-eight billion, one hundred sixty million, seven hundred eighty-two thousand, eight hundred seventeen".