516555505 has 8 divisors (see below), whose sum is σ = 646817472. Its totient is φ = 395277168.

The previous prime is 516555499. The next prime is 516555509. The reversal of 516555505 is 505555615.

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 516555505 - 2³ = 516555497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516555509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245779 + ... + 2246008.

It is an arithmetic number, because the mean of its divisors is an integer number (80852184).

Almost surely, 2^516555505 is an apocalyptic number.

It is an amenable number.

516555505 is a deficient number, since it is larger than the sum of its proper divisors (130261967).

516555505 is a wasteful number, since it uses less digits than its factorization.

516555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491815.

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 516555505 is about 22727.8574661141. The cubic root of 516555505 is about 802.3656565452.

It can be divided in two parts, 51 and 6555505, that added together give a palindrome (6555556).

The spelling of 516555505 in words is "five hundred sixteen million, five hundred fifty-five thousand, five hundred five".