28523561039 has 4 divisors (see below), whose sum is σ = 28608201024. Its totient is φ = 28438921056.

The previous prime is 28523560981. The next prime is 28523561057. The reversal of 28523561039 is 93016532582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28523561039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28523561239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42319487 + ... + 42320160.

It is an arithmetic number, because the mean of its divisors is an integer number (7152050256).

Almost surely, 2^28523561039 is an apocalyptic number.

28523561039 is a deficient number, since it is larger than the sum of its proper divisors (84639985).

28523561039 is an equidigital number, since it uses as much as digits as its factorization.

28523561039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84639984.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 28523561039 in words is "twenty-eight billion, five hundred twenty-three million, five hundred sixty-one thousand, thirty-nine".