8156443189 has 2 divisors, whose sum is σ = 8156443190. Its totient is φ = 8156443188.

The previous prime is 8156443147. The next prime is 8156443193. The reversal of 8156443189 is 9813446518.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7433371089 + 723072100 = 86217^2 + 26890^2 .

It is a cyclic number.

It is not a de Polignac number, because 8156443189 - 2¹³ = 8156434997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8156443129) by changing a digit.

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 as a sum of consecutive naturals, namely, 4078221594 + 4078221595.

It is an arithmetic number, because the mean of its divisors is an integer number (4078221595).

Almost surely, 2^8156443189 is an apocalyptic number.

It is an amenable number.

8156443189 is a deficient number, since it is larger than the sum of its proper divisors (1).

8156443189 is an equidigital number, since it uses as much as digits as its factorization.

8156443189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 8156443189 is about 90313.0288994894. The cubic root of 8156443189 is about 2012.9528629879.

The spelling of 8156443189 in words is "eight billion, one hundred fifty-six million, four hundred forty-three thousand, one hundred eighty-nine".