8259818005 has 4 divisors (see below), whose sum is σ = 9911781612. Its totient is φ = 6607854400.

The previous prime is 8259818003. The next prime is 8259818009. The reversal of 8259818005 is 5008189528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2642165604 + 5617652401 = 51402^2 + 74951^2 .

It is not a de Polignac number, because 8259818005 - 2¹ = 8259818003 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 (8259818003) 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, 825981796 + ... + 825981805.

It is an arithmetic number, because the mean of its divisors is an integer number (2477945403).

Almost surely, 2^8259818005 is an apocalyptic number.

It is an amenable number.

8259818005 is a deficient number, since it is larger than the sum of its proper divisors (1651963607).

8259818005 is a wasteful number, since it uses less digits than its factorization.

8259818005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651963606.

The product of its (nonzero) digits is 230400, while the sum is 46.

The square root of 8259818005 is about 90883.5408916268. The cubic root of 8259818005 is about 2021.4212463880.

It can be divided in two parts, 825981 and 8005, that added together give a triangular number (833986 = T₁₂₉₁).

The spelling of 8259818005 in words is "eight billion, two hundred fifty-nine million, eight hundred eighteen thousand, five".