516565988 has 6 divisors (see below), whose sum is σ = 903990486. Its totient is φ = 258282992.

The previous prime is 516565957. The next prime is 516565997. The reversal of 516565988 is 889565615.

It can be written as a sum of positive squares in only one way, i.e., 308283364 + 208282624 = 17558^2 + 14432^2 .

It is a super-2 number, since 2×516565988² = 533680839916832288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64570745 + ... + 64570752.

It is an arithmetic number, because the mean of its divisors is an integer number (150665081).

Almost surely, 2^516565988 is an apocalyptic number.

It is an amenable number.

516565988 is a deficient number, since it is larger than the sum of its proper divisors (387424498).

516565988 is a wasteful number, since it uses less digits than its factorization.

516565988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129141501 (or 129141499 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 53.

The square root of 516565988 is about 22728.0880850106. The cubic root of 516565988 is about 802.3710842564.

The spelling of 516565988 in words is "five hundred sixteen million, five hundred sixty-five thousand, nine hundred eighty-eight".