4999806985 has 4 divisors (see below), whose sum is σ = 5999768388. Its totient is φ = 3999845584.

The previous prime is 4999806979. The next prime is 4999806997. The reversal of 4999806985 is 5896089994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1541426121 + 3458380864 = 39261^2 + 58808^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999806985 - 2¹⁷ = 4999675913 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4999806985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499980694 + ... + 499980703.

It is an arithmetic number, because the mean of its divisors is an integer number (1499942097).

Almost surely, 2^4999806985 is an apocalyptic number.

It is an amenable number.

4999806985 is a deficient number, since it is larger than the sum of its proper divisors (999961403).

4999806985 is an equidigital number, since it uses as much as digits as its factorization.

4999806985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999961402.

The product of its (nonzero) digits is 50388480, while the sum is 67.

The square root of 4999806985 is about 70709.3132833292. The cubic root of 4999806985 is about 1709.9539429931.

The spelling of 4999806985 in words is "four billion, nine hundred ninety-nine million, eight hundred six thousand, nine hundred eighty-five".