42165554579 has 2 divisors, whose sum is σ = 42165554580. Its totient is φ = 42165554578.

The previous prime is 42165554491. The next prime is 42165554723. The reversal of 42165554579 is 97545556124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42165554579 - 2⁸ = 42165554323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42165554579.

It is not a weakly prime, because it can be changed into another prime (42165554279) 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, 21082777289 + 21082777290.

It is an arithmetic number, because the mean of its divisors is an integer number (21082777290).

Almost surely, 2^42165554579 is an apocalyptic number.

42165554579 is a deficient number, since it is larger than the sum of its proper divisors (1).

42165554579 is an equidigital number, since it uses as much as digits as its factorization.

42165554579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560000, while the sum is 53.

The spelling of 42165554579 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-four thousand, five hundred seventy-nine".