25532420040 has 48 divisors (see below), whose sum is σ = 82980366300. Its totient is φ = 6808645248.

The previous prime is 25532420027. The next prime is 25532420047. The reversal of 25532420040 is 4002423552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25001301924 + 531118116 = 158118^2 + 23046^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25532419986 and 25532420013.

It is not an unprimeable number, because it can be changed into a prime (25532420047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35461335 + ... + 35462054.

Almost surely, 2^25532420040 is an apocalyptic number.

25532420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25532420040 is an abundant number, since it is smaller than the sum of its proper divisors (57447946260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25532420040 is a wasteful number, since it uses less digits than its factorization.

25532420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70923406 (or 70923399 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 25532420040 its reverse (4002423552), we get a palindrome (29534843592).

The spelling of 25532420040 in words is "twenty-five billion, five hundred thirty-two million, four hundred twenty thousand, forty".