5129985566 has 16 divisors (see below), whose sum is σ = 7980409440. Its totient is φ = 2470295520.

The previous prime is 5129985557. The next prime is 5129985571. The reversal of 5129985566 is 6655899215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88370 + ... + 134421.

It is an arithmetic number, because the mean of its divisors is an integer number (498775590).

Almost surely, 2^5129985566 is an apocalyptic number.

5129985566 is a deficient number, since it is larger than the sum of its proper divisors (2850423874).

5129985566 is a wasteful number, since it uses less digits than its factorization.

5129985566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223219.

The product of its digits is 5832000, while the sum is 56.

The square root of 5129985566 is about 71623.9175555205. The cubic root of 5129985566 is about 1724.6675061463.

The spelling of 5129985566 in words is "five billion, one hundred twenty-nine million, nine hundred eighty-five thousand, five hundred sixty-six".