516515663 has 8 divisors (see below), whose sum is σ = 537013680. Its totient is φ = 496393920.

The previous prime is 516515647. The next prime is 516515689. The reversal of 516515663 is 366515615.

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 516515663 - 2⁴ = 516515647 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 (516515693) 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, 91268 + ... + 96761.

It is an arithmetic number, because the mean of its divisors is an integer number (67126710).

Almost surely, 2^516515663 is an apocalyptic number.

516515663 is a deficient number, since it is larger than the sum of its proper divisors (20498017).

516515663 is a wasteful number, since it uses less digits than its factorization.

516515663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188137.

The product of its digits is 81000, while the sum is 38.

The square root of 516515663 is about 22726.9809477634. The cubic root of 516515663 is about 802.3450271556.

The spelling of 516515663 in words is "five hundred sixteen million, five hundred fifteen thousand, six hundred sixty-three".