28551143559 has 4 divisors (see below), whose sum is σ = 38068191416. Its totient is φ = 19034095704.

The previous prime is 28551143549. The next prime is 28551143567. The reversal of 28551143559 is 95534115582.

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

It is not a de Polignac number, because 28551143559 - 2¹⁹ = 28550619271 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 (28551143549) 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, 4758523924 + ... + 4758523929.

It is an arithmetic number, because the mean of its divisors is an integer number (9517047854).

Almost surely, 2^28551143559 is an apocalyptic number.

28551143559 is a deficient number, since it is larger than the sum of its proper divisors (9517047857).

28551143559 is an equidigital number, since it uses as much as digits as its factorization.

28551143559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9517047856.

The product of its digits is 1080000, while the sum is 48.

The spelling of 28551143559 in words is "twenty-eight billion, five hundred fifty-one million, one hundred forty-three thousand, five hundred fifty-nine".