7999999999993 has 2 divisors, whose sum is σ = 7999999999994. Its totient is φ = 7999999999992.

The previous prime is 7999999999991. The next prime is 8000000000009. The reversal of 7999999999993 is 3999999999997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7418361926889 + 581638073104 = 2723667^2 + 762652^2 .

It is a cyclic number.

It is not a de Polignac number, because 7999999999993 - 2¹ = 7999999999991 is a prime.

Together with 7999999999991, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7999999999993.

It is not a weakly prime, because it can be changed into another prime (7999999999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999999999996 + 3999999999997.

It is an arithmetic number, because the mean of its divisors is an integer number (3999999999997).

Almost surely, 2^{7999999999993} is an apocalyptic number.

It is an amenable number.

7999999999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

7999999999993 is an equidigital number, since it uses as much as digits as its factorization.

7999999999993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 659002251789, while the sum is 109.

It can be divided in two parts, 7 and 999999999993, that added together give a 12-th power (1000000000000 = 10¹²).

The spelling of 7999999999993 in words is "seven trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".