7851845242 has 16 divisors (see below), whose sum is σ = 11900292264. Its totient is φ = 3885120000.

The previous prime is 7851845189. The next prime is 7851845293. The reversal of 7851845242 is 2425481587.

It can be written as a sum of positive squares in 4 ways, for example, as 7570914121 + 280931121 = 87011^2 + 16761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7851845192 and 7851845201.

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, 452242 + ... + 469282.

Almost surely, 2^7851845242 is an apocalyptic number.

7851845242 is a deficient number, since it is larger than the sum of its proper divisors (4048447022).

7851845242 is a wasteful number, since it uses less digits than its factorization.

7851845242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19425.

The product of its digits is 716800, while the sum is 46.

The square root of 7851845242 is about 88610.6384245142. The cubic root of 7851845242 is about 1987.5767615198.

The spelling of 7851845242 in words is "seven billion, eight hundred fifty-one million, eight hundred forty-five thousand, two hundred forty-two".