1025648636 has 6 divisors (see below), whose sum is σ = 1794885120. Its totient is φ = 512824316.

The previous prime is 1025648623. The next prime is 1025648639. The reversal of 1025648636 is 6368465201.

It is a junction number, because it is equal to n+sod(n) for n = 1025648593 and 1025648602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025648639) 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 as a sum of consecutive naturals, namely, 128206076 + ... + 128206083.

It is an arithmetic number, because the mean of its divisors is an integer number (299147520).

Almost surely, 2^1025648636 is an apocalyptic number.

It is an amenable number.

1025648636 is a deficient number, since it is larger than the sum of its proper divisors (769236484).

1025648636 is a wasteful number, since it uses less digits than its factorization.

1025648636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256412163 (or 256412161 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 1025648636 is about 32025.7495774884. The cubic root of 1025648636 is about 1008.4774746713.

The spelling of 1025648636 in words is "one billion, twenty-five million, six hundred forty-eight thousand, six hundred thirty-six".