42165561133 has 4 divisors (see below), whose sum is σ = 42238638940. Its totient is φ = 42092483328.

The previous prime is 42165561131. The next prime is 42165561173. The reversal of 42165561133 is 33116556124.

42165561133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29173664809 + 12991896324 = 170803^2 + 113982^2 .

It is a cyclic number.

It is not a de Polignac number, because 42165561133 - 2¹ = 42165561131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42165561092 and 42165561101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165561131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36538038 + ... + 36539191.

It is an arithmetic number, because the mean of its divisors is an integer number (10559659735).

Almost surely, 2^42165561133 is an apocalyptic number.

It is an amenable number.

42165561133 is a deficient number, since it is larger than the sum of its proper divisors (73077807).

42165561133 is an equidigital number, since it uses as much as digits as its factorization.

42165561133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73077806.

The product of its digits is 64800, while the sum is 37.

The spelling of 42165561133 in words is "forty-two billion, one hundred sixty-five million, five hundred sixty-one thousand, one hundred thirty-three".