540021134423 has 4 divisors (see below), whose sum is σ = 542013832608. Its totient is φ = 538028436240.

The previous prime is 540021134417. The next prime is 540021134431. The reversal of 540021134423 is 324431120045.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540021134423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540021134453) 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, 996348686 + ... + 996349227.

It is an arithmetic number, because the mean of its divisors is an integer number (135503458152).

Almost surely, 2^540021134423 is an apocalyptic number.

540021134423 is a deficient number, since it is larger than the sum of its proper divisors (1992698185).

540021134423 is a wasteful number, since it uses less digits than its factorization.

540021134423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992698184.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 540021134423 its reverse (324431120045), we get a palindrome (864452254468).

The spelling of 540021134423 in words is "five hundred forty billion, twenty-one million, one hundred thirty-four thousand, four hundred twenty-three".