516895991 has 16 divisors (see below), whose sum is σ = 545445120. Its totient is φ = 489343680.

The previous prime is 516895987. The next prime is 516895993. The reversal of 516895991 is 199598615.

It is a cyclic number.

It is not a de Polignac number, because 516895991 - 2² = 516895987 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 (516895993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183806 + ... + 186596.

It is an arithmetic number, because the mean of its divisors is an integer number (34090320).

Almost surely, 2^516895991 is an apocalyptic number.

516895991 is a deficient number, since it is larger than the sum of its proper divisors (28549129).

516895991 is a wasteful number, since it uses less digits than its factorization.

516895991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966.

The product of its digits is 874800, while the sum is 53.

The square root of 516895991 is about 22735.3467314664. The cubic root of 516895991 is about 802.5419101245.

The spelling of 516895991 in words is "five hundred sixteen million, eight hundred ninety-five thousand, nine hundred ninety-one".