28343520516873 has 4 divisors (see below), whose sum is σ = 37791360689168. Its totient is φ = 18895680344580.

The previous prime is 28343520516853. The next prime is 28343520516881. The reversal of 28343520516873 is 37861502534382.

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 not a de Polignac number, because 28343520516873 - 2²¹ = 28343518419721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28343520516803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4723920086143 + ... + 4723920086148.

It is an arithmetic number, because the mean of its divisors is an integer number (9447840172292).

Almost surely, 2^{28343520516873} is an apocalyptic number.

It is an amenable number.

28343520516873 is a deficient number, since it is larger than the sum of its proper divisors (9447840172295).

28343520516873 is an equidigital number, since it uses as much as digits as its factorization.

28343520516873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447840172294.

The product of its (nonzero) digits is 29030400, while the sum is 57.

The spelling of 28343520516873 in words is "twenty-eight trillion, three hundred forty-three billion, five hundred twenty million, five hundred sixteen thousand, eight hundred seventy-three".