7991602205 has 6 divisors (see below), whose sum is σ = 9590162526. Its totient is φ = 6393121848.

The previous prime is 7991602193. The next prime is 7991602271. The reversal of 7991602205 is 5022061997.

It can be written as a sum of positive squares in only one way, i.e., 6393281764 + 1598320441 = 79958^2 + 39979^2 .

It is not a de Polignac number, because 7991602205 - 2¹⁶ = 7991536669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179906 + ... + 219884.

It is an arithmetic number, because the mean of its divisors is an integer number (1598360421).

Almost surely, 2^7991602205 is an apocalyptic number.

It is an amenable number.

7991602205 is a deficient number, since it is larger than the sum of its proper divisors (1598560321).

7991602205 is an frugal number, since it uses more digits than its factorization.

7991602205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79963 (or 39984 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 7991602205 is about 89395.7616724641. The cubic root of 7991602205 is about 1999.2999387357.

The spelling of 7991602205 in words is "seven billion, nine hundred ninety-one million, six hundred two thousand, two hundred five".