42045661165 has 16 divisors (see below), whose sum is σ = 54941702400. Its totient is φ = 30767349312.

The previous prime is 42045661093. The next prime is 42045661193. The reversal of 42045661165 is 56116654024.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42045661165 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 7628037 + ... + 7633546.

It is an arithmetic number, because the mean of its divisors is an integer number (3433856400).

Almost surely, 2^42045661165 is an apocalyptic number.

It is an amenable number.

42045661165 is a deficient number, since it is larger than the sum of its proper divisors (12896041235).

42045661165 is a wasteful number, since it uses less digits than its factorization.

42045661165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15261636.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 42045661165 in words is "forty-two billion, forty-five million, six hundred sixty-one thousand, one hundred sixty-five".