28494758559 has 4 divisors (see below), whose sum is σ = 37993011416. Its totient is φ = 18996505704.

The previous prime is 28494758507. The next prime is 28494758569. The reversal of 28494758559 is 95585749482.

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

It is not a de Polignac number, because 28494758559 - 2¹³ = 28494750367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28494758559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28494758569) 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, 4749126424 + ... + 4749126429.

It is an arithmetic number, because the mean of its divisors is an integer number (9498252854).

Almost surely, 2^28494758559 is an apocalyptic number.

28494758559 is a deficient number, since it is larger than the sum of its proper divisors (9498252857).

28494758559 is an equidigital number, since it uses as much as digits as its factorization.

28494758559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9498252856.

The product of its digits is 145152000, while the sum is 66.

The spelling of 28494758559 in words is "twenty-eight billion, four hundred ninety-four million, seven hundred fifty-eight thousand, five hundred fifty-nine".