28317586109 has 2 divisors, whose sum is σ = 28317586110. Its totient is φ = 28317586108.

The previous prime is 28317586097. The next prime is 28317586127. The reversal of 28317586109 is 90168571382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19816192900 + 8501393209 = 140770^2 + 92203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28317586109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28317586159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158793054 + 14158793055.

It is an arithmetic number, because the mean of its divisors is an integer number (14158793055).

Almost surely, 2^28317586109 is an apocalyptic number.

It is an amenable number.

28317586109 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317586109 is an equidigital number, since it uses as much as digits as its factorization.

28317586109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 28317586109 in words is "twenty-eight billion, three hundred seventeen million, five hundred eighty-six thousand, one hundred nine".