8518817813 has 12 divisors (see below), whose sum is σ = 9367881600. Its totient is φ = 7740887880.

The previous prime is 8518817761. The next prime is 8518817863. The reversal of 8518817813 is 3187188158.

It is not a de Polignac number, because 8518817813 - 2²⁶ = 8451708949 is a prime.

It is a super-2 number, since 2×8518817813² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8518817863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275606 + ... + 304952.

It is an arithmetic number, because the mean of its divisors is an integer number (780656800).

Almost surely, 2^8518817813 is an apocalyptic number.

It is an amenable number.

8518817813 is a deficient number, since it is larger than the sum of its proper divisors (849063787).

8518817813 is a wasteful number, since it uses less digits than its factorization.

8518817813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31768 (or 31757 counting only the distinct ones).

The product of its digits is 430080, while the sum is 50.

The square root of 8518817813 is about 92297.4420718148. The cubic root of 8518817813 is about 2042.3324766734.

The spelling of 8518817813 in words is "eight billion, five hundred eighteen million, eight hundred seventeen thousand, eight hundred thirteen".