42165285242081 has 16 divisors (see below), whose sum is σ = 44944503778944. Its totient is φ = 39420148387584.

The previous prime is 42165285242063. The next prime is 42165285242107. The reversal of 42165285242081 is 18024258256124.

42165285242081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42165285242081 - 2²² = 42165281047777 is a prime.

It is a super-2 number, since 2×42165285242081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42165285242021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12037670 + ... + 15140543.

It is an arithmetic number, because the mean of its divisors is an integer number (2809031486184).

Almost surely, 2^{42165285242081} is an apocalyptic number.

It is an amenable number.

42165285242081 is a deficient number, since it is larger than the sum of its proper divisors (2779218536863).

42165285242081 is a wasteful number, since it uses less digits than its factorization.

42165285242081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27178840.

The product of its (nonzero) digits is 2457600, while the sum is 50.

The spelling of 42165285242081 in words is "forty-two trillion, one hundred sixty-five billion, two hundred eighty-five million, two hundred forty-two thousand, eighty-one".