3945682625 has 8 divisors (see below), whose sum is σ = 4924212072. Its totient is φ = 3156546000.

The previous prime is 3945682621. The next prime is 3945682639. The reversal of 3945682625 is 5262865493.

It can be written as a sum of positive squares in 4 ways, for example, as 868539841 + 3077142784 = 29471^2 + 55472^2 .

It is not a de Polignac number, because 3945682625 - 2² = 3945682621 is a prime.

It is a super-2 number, since 2×3945682625² = 31136822754453781250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3945682621) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15782606 + ... + 15782855.

It is an arithmetic number, because the mean of its divisors is an integer number (615526509).

Almost surely, 2^3945682625 is an apocalyptic number.

It is an amenable number.

3945682625 is a deficient number, since it is larger than the sum of its proper divisors (978529447).

3945682625 is an equidigital number, since it uses as much as digits as its factorization.

3945682625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31565476 (or 31565466 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The square root of 3945682625 is about 62814.6688680280. The cubic root of 3945682625 is about 1580.1829923449.

The spelling of 3945682625 in words is "three billion, nine hundred forty-five million, six hundred eighty-two thousand, six hundred twenty-five".