42165554279 has 2 divisors, whose sum is σ = 42165554280. Its totient is φ = 42165554278.

The previous prime is 42165554159. The next prime is 42165554311. The reversal of 42165554279 is 97245556124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42165554279 - 2²⁴ = 42148777063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42165554579) 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, 21082777139 + 21082777140.

It is an arithmetic number, because the mean of its divisors is an integer number (21082777140).

Almost surely, 2^42165554279 is an apocalyptic number.

42165554279 is a deficient number, since it is larger than the sum of its proper divisors (1).

42165554279 is an equidigital number, since it uses as much as digits as its factorization.

42165554279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024000, while the sum is 50.

The spelling of 42165554279 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-four thousand, two hundred seventy-nine".