5205986690 has 8 divisors (see below), whose sum is σ = 9370776060. Its totient is φ = 2082394672.

The previous prime is 5205986671. The next prime is 5205986713. The reversal of 5205986690 is 966895025.

It can be written as a sum of positive squares in 2 ways, for example, as 5202304129 + 3682561 = 72127^2 + 1919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×5205986690² = 54204594832914312200, which contains 22 as substring.

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, 260299325 + ... + 260299344.

Almost surely, 2^5205986690 is an apocalyptic number.

5205986690 is a deficient number, since it is larger than the sum of its proper divisors (4164789370).

5205986690 is a wasteful number, since it uses less digits than its factorization.

5205986690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520598676.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 5205986690 is about 72152.5237950829. The cubic root of 5205986690 is about 1733.1428153109.

The spelling of 5205986690 in words is "five billion, two hundred five million, nine hundred eighty-six thousand, six hundred ninety".