8018138647 has 4 divisors (see below), whose sum is σ = 8025448896. Its totient is φ = 8010828400.

The previous prime is 8018138603. The next prime is 8018138651. The reversal of 8018138647 is 7468318108.

8018138647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8018138647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8018138597 and 8018138606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8018138657) 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, 3653479 + ... + 3655672.

It is an arithmetic number, because the mean of its divisors is an integer number (2006362224).

Almost surely, 2^8018138647 is an apocalyptic number.

8018138647 is a deficient number, since it is larger than the sum of its proper divisors (7310249).

8018138647 is a wasteful number, since it uses less digits than its factorization.

8018138647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7310248.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 8018138647 is about 89544.0598085657. The cubic root of 8018138647 is about 2001.5104129559.

It can be divided in two parts, 80181 and 38647, that added together give a triangular number (118828 = T₄₈₇).

The spelling of 8018138647 in words is "eight billion, eighteen million, one hundred thirty-eight thousand, six hundred forty-seven".