516768817 has 4 divisors (see below), whose sum is σ = 516933360. Its totient is φ = 516604276.

The previous prime is 516768809. The next prime is 516768841. The reversal of 516768817 is 718867615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 516768817 - 2³ = 516768809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516768017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77467 + ... + 83872.

It is an arithmetic number, because the mean of its divisors is an integer number (129233340).

Almost surely, 2^516768817 is an apocalyptic number.

It is an amenable number.

516768817 is a deficient number, since it is larger than the sum of its proper divisors (164543).

516768817 is a wasteful number, since it uses less digits than its factorization.

516768817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164542.

The product of its digits is 564480, while the sum is 49.

The square root of 516768817 is about 22732.5497250089. The cubic root of 516768817 is about 802.4760871877.

It can be divided in two parts, 5167 and 68817, that added together give a square (73984 = 272²).

The spelling of 516768817 in words is "five hundred sixteen million, seven hundred sixty-eight thousand, eight hundred seventeen".