7999582599221 has 4 divisors (see below), whose sum is σ = 8109165922572. Its totient is φ = 7889999275872.

The previous prime is 7999582599209. The next prime is 7999582599227. The reversal of 7999582599221 is 1229952859997.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6878607744100 + 1120974855121 = 2622710^2 + 1058761^2 .

It is a cyclic number.

It is not a de Polignac number, because 7999582599221 - 2³⁸ = 7724704692277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999582599227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54791661566 + ... + 54791661711.

It is an arithmetic number, because the mean of its divisors is an integer number (2027291480643).

Almost surely, 2^{7999582599221} is an apocalyptic number.

It is an amenable number.

7999582599221 is a deficient number, since it is larger than the sum of its proper divisors (109583323351).

7999582599221 is a wasteful number, since it uses less digits than its factorization.

7999582599221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109583323350.

The product of its digits is 661348800, while the sum is 77.

The spelling of 7999582599221 in words is "seven trillion, nine hundred ninety-nine billion, five hundred eighty-two million, five hundred ninety-nine thousand, two hundred twenty-one".