7999518468964 has 81 divisors (see below), whose sum is σ = 15659915814291. Its totient is φ = 3572874748080.

The previous prime is 7999518468961. The next prime is 7999518469043. The reversal of 7999518468964 is 4698648159997.

The square root of 7999518468964 is 2828342.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×7999518468964² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7999518468961) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3671186827 + ... + 3671189005.

Almost surely, 2^{7999518468964} is an apocalyptic number.

7999518468964 is the 2828342-nd square number.

It is an amenable number.

7999518468964 is a deficient number, since it is larger than the sum of its proper divisors (7660397345327).

7999518468964 is an equidigital number, since it uses as much as digits as its factorization.

7999518468964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502 (or 2251 counting only the distinct ones).

The product of its digits is 8465264640, while the sum is 85.

The spelling of 7999518468964 in words is "seven trillion, nine hundred ninety-nine billion, five hundred eighteen million, four hundred sixty-eight thousand, nine hundred sixty-four".