42143564545 has 4 divisors (see below), whose sum is σ = 50572277460. Its totient is φ = 33714851632.

The previous prime is 42143564543. The next prime is 42143564549. The reversal of 42143564545 is 54546534124.

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 24398127601 + 17745436944 = 156199^2 + 133212^2 .

It is a cyclic number.

It is not a de Polignac number, because 42143564545 - 2¹ = 42143564543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42143564543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214356450 + ... + 4214356459.

It is an arithmetic number, because the mean of its divisors is an integer number (12643069365).

Almost surely, 2^42143564545 is an apocalyptic number.

It is an amenable number.

42143564545 is a deficient number, since it is larger than the sum of its proper divisors (8428712915).

42143564545 is an equidigital number, since it uses as much as digits as its factorization.

42143564545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428712914.

The product of its digits is 1152000, while the sum is 43.

The spelling of 42143564545 in words is "forty-two billion, one hundred forty-three million, five hundred sixty-four thousand, five hundred forty-five".