7851161313 has 12 divisors (see below), whose sum is σ = 11647068628. Its totient is φ = 5092644960.

The previous prime is 7851161291. The next prime is 7851161317. The reversal of 7851161313 is 3131611587.

7851161313 is a `hidden beast` number, since 7 + 8 + 511 + 6 + 131 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3013680609 + 4837480704 = 54897^2 + 69552^2 .

It is not a de Polignac number, because 7851161313 - 2⁶ = 7851161249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7851161317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11788198 + ... + 11788863.

Almost surely, 2^7851161313 is an apocalyptic number.

It is an amenable number.

7851161313 is a deficient number, since it is larger than the sum of its proper divisors (3795907315).

7851161313 is a wasteful number, since it uses less digits than its factorization.

7851161313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23577104 (or 23577101 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 7851161313 is about 88606.7791593849. The cubic root of 7851161313 is about 1987.5190510574.

The spelling of 7851161313 in words is "seven billion, eight hundred fifty-one million, one hundred sixty-one thousand, three hundred thirteen".