7973764218 has 120 divisors (see below), whose sum is σ = 21342241908. Its totient is φ = 2144007936.

The previous prime is 7973764213. The next prime is 7973764229. The reversal of 7973764218 is 8124673797.

It can be written as a sum of positive squares in 2 ways, for example, as 7753330809 + 220433409 = 88053^2 + 14847^2 .

It is not an unprimeable number, because it can be changed into a prime (7973764213) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 729280 + ... + 740132.

Almost surely, 2^7973764218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7973764218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10671120954).

7973764218 is an abundant number, since it is smaller than the sum of its proper divisors (13368477690).

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

7973764218 is a wasteful number, since it uses less digits than its factorization.

7973764218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10906 (or 10882 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 7973764218 is about 89295.9361785294. The cubic root of 7973764218 is about 1997.8112904824.

The spelling of 7973764218 in words is "seven billion, nine hundred seventy-three million, seven hundred sixty-four thousand, two hundred eighteen".