42165560545 has 8 divisors (see below), whose sum is σ = 51062881320. Its totient is φ = 33422976000.

The previous prime is 42165560519. The next prime is 42165560557. The reversal of 42165560545 is 54506556124.

It can be written as a sum of positive squares in 4 ways, for example, as 3815779984 + 38349780561 = 61772^2 + 195831^2 .

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

It is not a de Polignac number, because 42165560545 - 2³¹ = 40018076897 is a prime.

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, 38683456 + ... + 38684545.

It is an arithmetic number, because the mean of its divisors is an integer number (6382860165).

Almost surely, 2^42165560545 is an apocalyptic number.

It is an amenable number.

42165560545 is a deficient number, since it is larger than the sum of its proper divisors (8897320775).

42165560545 is a wasteful number, since it uses less digits than its factorization.

42165560545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77368115.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 42165560545 in words is "forty-two billion, one hundred sixty-five million, five hundred sixty thousand, five hundred forty-five".