8318618406 has 128 divisors (see below), whose sum is σ = 21714739200. Its totient is φ = 2311092000.

The previous prime is 8318618389. The next prime is 8318618417. The reversal of 8318618406 is 6048168138.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4078735 + ... + 4080773.

It is an arithmetic number, because the mean of its divisors is an integer number (169646400).

Almost surely, 2^8318618406 is an apocalyptic number.

8318618406 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 8318618406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10857369600).

8318618406 is an abundant number, since it is smaller than the sum of its proper divisors (13396120794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8318618406 is a wasteful number, since it uses less digits than its factorization.

8318618406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 8318618406 is about 91206.4603303955. The cubic root of 8318618406 is about 2026.2066399768.

The spelling of 8318618406 in words is "eight billion, three hundred eighteen million, six hundred eighteen thousand, four hundred six".