39808843830625 has 135 divisors (see below), whose sum is σ = 54109113249807. Its totient is φ = 29273712984000.

The previous prime is 39808843830619. The next prime is 39808843830643. The reversal of 39808843830625 is 52603834880893.

The square root of 39808843830625 is 6309425.

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

It can be written as a sum of positive squares in 7 ways, for example, as 13217536461649 + 26591307368976 = 3635593^2 + 5156676^2 .

It is not a de Polignac number, because 39808843830625 - 2³ = 39808843830617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 110888144196 + ... + 110888144554.

Almost surely, 2^{39808843830625} is an apocalyptic number.

39808843830625 is the 6309425-th square number.

39808843830625 is the 3154713-rd centered octagonal number.

It is an amenable number.

39808843830625 is a deficient number, since it is larger than the sum of its proper divisors (14300269419182).

39808843830625 is an frugal number, since it uses more digits than its factorization.

39808843830625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 67.

The spelling of 39808843830625 in words is "thirty-nine trillion, eight hundred eight billion, eight hundred forty-three million, eight hundred thirty thousand, six hundred twenty-five".