7644118986 has 128 divisors (see below), whose sum is σ = 20893662720. Its totient is φ = 2021760000.

The previous prime is 7644118981. The next prime is 7644119009. The reversal of 7644118986 is 6898114467.

7644118986 is a `hidden beast` number, since 76 + 4 + 411 + 89 + 86 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (7644118981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 382236 + ... + 401736.

It is an arithmetic number, because the mean of its divisors is an integer number (163231740).

Almost surely, 2^7644118986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7644118986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10446831360).

7644118986 is an abundant number, since it is smaller than the sum of its proper divisors (13249543734).

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

7644118986 is a wasteful number, since it uses less digits than its factorization.

7644118986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597 (or 19591 counting only the distinct ones).

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

The square root of 7644118986 is about 87430.6524395192. The cubic root of 7644118986 is about 1969.8922859329.

It can be divided in two parts, 764411898 and 6, that added together give a square (764411904 = 27648²).

The spelling of 7644118986 in words is "seven billion, six hundred forty-four million, one hundred eighteen thousand, nine hundred eighty-six".