516491689 has 8 divisors (see below), whose sum is σ = 591193728. Its totient is φ = 442019040.

The previous prime is 516491669. The next prime is 516491693. The reversal of 516491689 is 986194615.

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 516491689 - 2¹⁷ = 516360617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516491669) 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, 52492 + ... + 61549.

It is an arithmetic number, because the mean of its divisors is an integer number (73899216).

Almost surely, 2^516491689 is an apocalyptic number.

It is an amenable number.

516491689 is a deficient number, since it is larger than the sum of its proper divisors (74702039).

516491689 is a wasteful number, since it uses less digits than its factorization.

516491689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114695.

The product of its digits is 466560, while the sum is 49.

The square root of 516491689 is about 22726.4535068717. The cubic root of 516491689 is about 802.3326133873.

The spelling of 516491689 in words is "five hundred sixteen million, four hundred ninety-one thousand, six hundred eighty-nine".