1325665636 has 6 divisors (see below), whose sum is σ = 2319914870. Its totient is φ = 662832816.

The previous prime is 1325665613. The next prime is 1325665639. The reversal of 1325665636 is 6365665231.

It can be written as a sum of positive squares in only one way, i.e., 903363136 + 422302500 = 30056^2 + 20550^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1325665592 and 1325665601.

It is not an unprimeable number, because it can be changed into a prime (1325665639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165708201 + ... + 165708208.

Almost surely, 2^1325665636 is an apocalyptic number.

It is an amenable number.

1325665636 is a deficient number, since it is larger than the sum of its proper divisors (994249234).

1325665636 is a wasteful number, since it uses less digits than its factorization.

1325665636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331416413 (or 331416411 counting only the distinct ones).

The product of its digits is 583200, while the sum is 43.

The square root of 1325665636 is about 36409.6915120137. The cubic root of 1325665636 is about 1098.5285106775.

The spelling of 1325665636 in words is "one billion, three hundred twenty-five million, six hundred sixty-five thousand, six hundred thirty-six".