7117641845 has 4 divisors (see below), whose sum is σ = 8541170220. Its totient is φ = 5694113472.

The previous prime is 7117641829. The next prime is 7117641871. The reversal of 7117641845 is 5481467117.

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 1380791281 + 5736850564 = 37159^2 + 75742^2 .

It is a cyclic number.

It is not a de Polignac number, because 7117641845 - 2⁴ = 7117641829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7117641796 and 7117641805.

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 3 ways as a sum of consecutive naturals, for example, 711764180 + ... + 711764189.

It is an arithmetic number, because the mean of its divisors is an integer number (2135292555).

Almost surely, 2^7117641845 is an apocalyptic number.

It is an amenable number.

7117641845 is a deficient number, since it is larger than the sum of its proper divisors (1423528375).

7117641845 is a wasteful number, since it uses less digits than its factorization.

7117641845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423528374.

The product of its digits is 188160, while the sum is 44.

The square root of 7117641845 is about 84366.1178732316. The cubic root of 7117641845 is about 1923.5879312147.

The spelling of 7117641845 in words is "seven billion, one hundred seventeen million, six hundred forty-one thousand, eight hundred forty-five".