42544213165 has 8 divisors (see below), whose sum is σ = 51055024248. Its totient is φ = 34034058240.

The previous prime is 42544213091. The next prime is 42544213171. The reversal of 42544213165 is 56131244524.

It can be written as a sum of positive squares in 4 ways, for example, as 22590390601 + 19953822564 = 150301^2 + 141258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42544213165 - 2¹⁷ = 42544082093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7876 + ... + 291805.

It is an arithmetic number, because the mean of its divisors is an integer number (6381878031).

Almost surely, 2^42544213165 is an apocalyptic number.

It is an amenable number.

42544213165 is a deficient number, since it is larger than the sum of its proper divisors (8510811083).

42544213165 is a wasteful number, since it uses less digits than its factorization.

42544213165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328079.

The product of its digits is 115200, while the sum is 37.

Adding to 42544213165 its reverse (56131244524), we get a palindrome (98675457689).

The spelling of 42544213165 in words is "forty-two billion, five hundred forty-four million, two hundred thirteen thousand, one hundred sixty-five".