506505516281 has 8 divisors (see below), whose sum is σ = 522345153600. Its totient is φ = 490907705680.

The previous prime is 506505516263. The next prime is 506505516299. The reversal of 506505516281 is 182615505605.

It is an interprime number because it is at equal distance from previous prime (506505516263) and next prime (506505516299).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506505516281 - 2³⁸ = 231627609337 is a prime.

It is a super-2 number, since 2×506505516281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506505516211) 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 7 ways as a sum of consecutive naturals, for example, 60452426 + ... + 60460803.

It is an arithmetic number, because the mean of its divisors is an integer number (65293144200).

Almost surely, 2^506505516281 is an apocalyptic number.

It is an amenable number.

506505516281 is a deficient number, since it is larger than the sum of its proper divisors (15839637319).

506505516281 is a wasteful number, since it uses less digits than its factorization.

506505516281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120913359.

The product of its (nonzero) digits is 360000, while the sum is 44.

The spelling of 506505516281 in words is "five hundred six billion, five hundred five million, five hundred sixteen thousand, two hundred eighty-one".