28745717159 has 4 divisors (see below), whose sum is σ = 28922071416. Its totient is φ = 28569362904.

The previous prime is 28745717149. The next prime is 28745717171. The reversal of 28745717159 is 95171754782.

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

It is a cyclic number.

It is not a de Polignac number, because 28745717159 - 2¹² = 28745713063 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 (28745717149) 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, 88176884 + ... + 88177209.

It is an arithmetic number, because the mean of its divisors is an integer number (7230517854).

Almost surely, 2^28745717159 is an apocalyptic number.

28745717159 is a deficient number, since it is larger than the sum of its proper divisors (176354257).

28745717159 is a wasteful number, since it uses less digits than its factorization.

28745717159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176354256.

The product of its digits is 4939200, while the sum is 56.

The spelling of 28745717159 in words is "twenty-eight billion, seven hundred forty-five million, seven hundred seventeen thousand, one hundred fifty-nine".