8042248428509 has 2 divisors, whose sum is σ = 8042248428510. Its totient is φ = 8042248428508.

The previous prime is 8042248428497. The next prime is 8042248428547. The reversal of 8042248428509 is 9058248422408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8020167360100 + 22081068409 = 2831990^2 + 148597^2 .

It is a cyclic number.

It is not a de Polignac number, because 8042248428509 - 2⁴ = 8042248428493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8042248328509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4021124214254 + 4021124214255.

It is an arithmetic number, because the mean of its divisors is an integer number (4021124214255).

Almost surely, 2^{8042248428509} is an apocalyptic number.

It is an amenable number.

8042248428509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8042248428509 is an equidigital number, since it uses as much as digits as its factorization.

8042248428509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11796480, while the sum is 56.

The spelling of 8042248428509 in words is "eight trillion, forty-two billion, two hundred forty-eight million, four hundred twenty-eight thousand, five hundred nine".