39999995948025 has 81 divisors (see below), whose sum is σ = 73209380558223. Its totient is φ = 20877103072800.

The previous prime is 39999995947973. The next prime is 39999995948039. The reversal of 39999995948025 is 52084959999993.

The square root of 39999995948025 is 6324555.

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

39999995948025 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 9 + 9 + 9 + 594 + 8 + 0 + 2 + 5 = 666.

39999995948025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 14399998541289 + 25599997406736 = 3794733^2 + 5059644^2 .

It is not a de Polignac number, because 39999995948025 - 2¹³ = 39999995939833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4458806790 + ... + 4458815760.

Almost surely, 2^{39999995948025} is an apocalyptic number.

39999995948025 is the 6324555-th square number.

39999995948025 is the 3162278-th centered octagonal number.

It is an amenable number.

39999995948025 is a deficient number, since it is larger than the sum of its proper divisors (33209384610198).

39999995948025 is an frugal number, since it uses more digits than its factorization.

39999995948025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18052 (or 9026 counting only the distinct ones).

The product of its (nonzero) digits is 22958251200, while the sum is 90.

The spelling of 39999995948025 in words is "thirty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-five million, nine hundred forty-eight thousand, twenty-five".