3640336025 has 6 divisors (see below), whose sum is σ = 4514016702. Its totient is φ = 2912268800.

The previous prime is 3640336013. The next prime is 3640336039. The reversal of 3640336025 is 5206330463.

It can be written as a sum of positive squares in 3 ways, for example, as 812649049 + 2827686976 = 28507^2 + 53176^2 .

It is not a de Polignac number, because 3640336025 - 2⁴ = 3640336009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3640335982 and 3640336000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72806696 + ... + 72806745.

It is an arithmetic number, because the mean of its divisors is an integer number (752336117).

Almost surely, 2^3640336025 is an apocalyptic number.

It is an amenable number.

3640336025 is a deficient number, since it is larger than the sum of its proper divisors (873680677).

3640336025 is a wasteful number, since it uses less digits than its factorization.

3640336025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145613451 (or 145613446 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 3640336025 is about 60335.1972317983. The cubic root of 3640336025 is about 1538.3216697795.

Adding to 3640336025 its reverse (5206330463), we get a palindrome (8846666488).

The spelling of 3640336025 in words is "three billion, six hundred forty million, three hundred thirty-six thousand, twenty-five".