28118806508159 has 4 divisors (see below), whose sum is σ = 28717078987104. Its totient is φ = 27520534029216.

The previous prime is 28118806508083. The next prime is 28118806508201. The reversal of 28118806508159 is 95180560881182.

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 28118806508159 - 2²⁴ = 28118789730943 is a prime.

It is a super-3 number, since 3×28118806508159³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28118806508659) 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, 299136239402 + ... + 299136239495.

It is an arithmetic number, because the mean of its divisors is an integer number (7179269746776).

Almost surely, 2^{28118806508159} is an apocalyptic number.

28118806508159 is a deficient number, since it is larger than the sum of its proper divisors (598272478945).

28118806508159 is an equidigital number, since it uses as much as digits as its factorization.

28118806508159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598272478944.

The product of its (nonzero) digits is 11059200, while the sum is 62.

The spelling of 28118806508159 in words is "twenty-eight trillion, one hundred eighteen billion, eight hundred six million, five hundred eight thousand, one hundred fifty-nine".