399608565316 has 9 divisors (see below), whose sum is σ = 699317201821. Its totient is φ = 199803650512.

The previous prime is 399608565289. The next prime is 399608565331. The reversal of 399608565316 is 613565806993.

The square root of 399608565316 is 632146.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 305900100 + 399302665216 = 17490^2 + 631904^2 .

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 1106256 + ... + 1422328.

Almost surely, 2^399608565316 is an apocalyptic number.

399608565316 is the 632146-th square number.

It is an amenable number.

399608565316 is a deficient number, since it is larger than the sum of its proper divisors (299708636505).

399608565316 is an frugal number, since it uses more digits than its factorization.

399608565316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632150 (or 316075 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 61.

The spelling of 399608565316 in words is "three hundred ninety-nine billion, six hundred eight million, five hundred sixty-five thousand, three hundred sixteen".