506540633129 has 4 divisors (see below), whose sum is σ = 506553662676. Its totient is φ = 506527603584.

The previous prime is 506540633117. The next prime is 506540633141. The reversal of 506540633129 is 921336045605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921336045605 = 5 ⋅184267209121.

It is an interprime number because it is at equal distance from previous prime (506540633117) and next prime (506540633141).

It can be written as a sum of positive squares in 2 ways, for example, as 141692016400 + 364848616729 = 376420^2 + 604027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506540633129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 506540633129.

It is not an unprimeable number, because it can be changed into a prime (506540633029) 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, 6456284 + ... + 6534269.

It is an arithmetic number, because the mean of its divisors is an integer number (126638415669).

Almost surely, 2^506540633129 is an apocalyptic number.

It is an amenable number.

506540633129 is a deficient number, since it is larger than the sum of its proper divisors (13029547).

506540633129 is a wasteful number, since it uses less digits than its factorization.

506540633129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13029546.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 506540633129 in words is "five hundred six billion, five hundred forty million, six hundred thirty-three thousand, one hundred twenty-nine".