7986644118 has 64 divisors (see below), whose sum is σ = 18206596800. Its totient is φ = 2593624320.

The previous prime is 7986644117. The next prime is 7986644179. The reversal of 7986644118 is 8114466897.

7986644118 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7986644117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1886428 + ... + 1890656.

It is an arithmetic number, because the mean of its divisors is an integer number (284478075).

Almost surely, 2^7986644118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7986644118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9103298400).

7986644118 is an abundant number, since it is smaller than the sum of its proper divisors (10219952682).

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

7986644118 is a wasteful number, since it uses less digits than its factorization.

7986644118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134 (or 5128 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 7986644118 is about 89368.0262621929. The cubic root of 7986644118 is about 1998.8863898847.

The spelling of 7986644118 in words is "seven billion, nine hundred eighty-six million, six hundred forty-four thousand, one hundred eighteen".