8155843049 has 2 divisors, whose sum is σ = 8155843050. Its totient is φ = 8155843048.

The previous prime is 8155843009. The next prime is 8155843117. The reversal of 8155843049 is 9403485518.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7202577424 + 953265625 = 84868^2 + 30875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8155843049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8155842994 and 8155843012.

It is not a weakly prime, because it can be changed into another prime (8155843009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4077921524 + 4077921525.

It is an arithmetic number, because the mean of its divisors is an integer number (4077921525).

Almost surely, 2^8155843049 is an apocalyptic number.

It is an amenable number.

8155843049 is a deficient number, since it is larger than the sum of its proper divisors (1).

8155843049 is an equidigital number, since it uses as much as digits as its factorization.

8155843049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 8155843049 is about 90309.7062834333. The cubic root of 8155843049 is about 2012.9034916654.

The spelling of 8155843049 in words is "eight billion, one hundred fifty-five million, eight hundred forty-three thousand, forty-nine".