8042128195489 has 2 divisors, whose sum is σ = 8042128195490. Its totient is φ = 8042128195488.

The previous prime is 8042128195393. The next prime is 8042128195499. The reversal of 8042128195489 is 9845918212408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5345251520400 + 2696876675089 = 2311980^2 + 1642217^2 .

It is a cyclic number.

It is not a de Polignac number, because 8042128195489 - 2²⁹ = 8041591324577 is a prime.

It is not a weakly prime, because it can be changed into another prime (8042128195499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4021064097744 + 4021064097745.

It is an arithmetic number, because the mean of its divisors is an integer number (4021064097745).

Almost surely, 2^{8042128195489} is an apocalyptic number.

It is an amenable number.

8042128195489 is a deficient number, since it is larger than the sum of its proper divisors (1).

8042128195489 is an equidigital number, since it uses as much as digits as its factorization.

8042128195489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 8042128195489 in words is "eight trillion, forty-two billion, one hundred twenty-eight million, one hundred ninety-five thousand, four hundred eighty-nine".