516716981668 has 12 divisors (see below), whose sum is σ = 904862835072. Its totient is φ = 258184743080.

The previous prime is 516716981663. The next prime is 516716981713. The reversal of 516716981668 is 866189617615.

It is not an unprimeable number, because it can be changed into a prime (516716981663) 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, 43430248 + ... + 43442143.

It is an arithmetic number, because the mean of its divisors is an integer number (75405236256).

Almost surely, 2^516716981668 is an apocalyptic number.

It is an amenable number.

516716981668 is a deficient number, since it is larger than the sum of its proper divisors (388145853404).

516716981668 is a wasteful number, since it uses less digits than its factorization.

516716981668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86873882 (or 86873880 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 64.

The spelling of 516716981668 in words is "five hundred sixteen billion, seven hundred sixteen million, nine hundred eighty-one thousand, six hundred sixty-eight".