8242161845 has 8 divisors (see below), whose sum is σ = 9940801464. Its totient is φ = 6560257984.

The previous prime is 8242161839. The next prime is 8242161853. The reversal of 8242161845 is 5481612428.

It can be written as a sum of positive squares in 4 ways, for example, as 1833038596 + 6409123249 = 42814^2 + 80057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8242161845 - 2²⁸ = 7973726389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4182854 + ... + 4184823.

It is an arithmetic number, because the mean of its divisors is an integer number (1242600183).

Almost surely, 2^8242161845 is an apocalyptic number.

It is an amenable number.

8242161845 is a deficient number, since it is larger than the sum of its proper divisors (1698639619).

8242161845 is a wasteful number, since it uses less digits than its factorization.

8242161845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8367879.

The product of its digits is 122880, while the sum is 41.

The square root of 8242161845 is about 90786.3527464343. The cubic root of 8242161845 is about 2019.9798910686.

The spelling of 8242161845 in words is "eight billion, two hundred forty-two million, one hundred sixty-one thousand, eight hundred forty-five".