540065215123 has 4 divisors (see below), whose sum is σ = 617217388720. Its totient is φ = 462913041528.

The previous prime is 540065215111. The next prime is 540065215141. The reversal of 540065215123 is 321512560045.

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

It is not a de Polignac number, because 540065215123 - 2²⁵ = 540031660691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540065215103) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38576086788 + ... + 38576086801.

It is an arithmetic number, because the mean of its divisors is an integer number (154304347180).

Almost surely, 2^540065215123 is an apocalyptic number.

540065215123 is a deficient number, since it is larger than the sum of its proper divisors (77152173597).

540065215123 is an equidigital number, since it uses as much as digits as its factorization.

540065215123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77152173596.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 540065215123 its reverse (321512560045), we get a palindrome (861577775168).

The spelling of 540065215123 in words is "five hundred forty billion, sixty-five million, two hundred fifteen thousand, one hundred twenty-three".