25385522648 has 32 divisors (see below), whose sum is σ = 49677291360. Its totient is φ = 12138466560.

The previous prime is 25385522647. The next prime is 25385522713. The reversal of 25385522648 is 84622558352.

It is a super-2 number, since 2×25385522648² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25385522596 and 25385522605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385522647) 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, 1189286 + ... + 1210442.

It is an arithmetic number, because the mean of its divisors is an integer number (1552415355).

Almost surely, 2^25385522648 is an apocalyptic number.

It is an amenable number.

25385522648 is a deficient number, since it is larger than the sum of its proper divisors (24291768712).

25385522648 is a wasteful number, since it uses less digits than its factorization.

25385522648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27707 (or 27703 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 50.

The spelling of 25385522648 in words is "twenty-five billion, three hundred eighty-five million, five hundred twenty-two thousand, six hundred forty-eight".