25505011040 has 48 divisors (see below), whose sum is σ = 61725252960. Its totient is φ = 9953172480.

The previous prime is 25505011033. The next prime is 25505011067. The reversal of 25505011040 is 4011050552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25505010997 and 25505011015.

It is a congruent number.

It is an unprimeable number.

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, 1937420 + ... + 1950539.

It is an arithmetic number, because the mean of its divisors is an integer number (1285942770).

Almost surely, 2^25505011040 is an apocalyptic number.

25505011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25505011040 is an abundant number, since it is smaller than the sum of its proper divisors (36220241920).

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

25505011040 is a wasteful number, since it uses less digits than its factorization.

25505011040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888015 (or 3888007 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 25505011040 its reverse (4011050552), we get a palindrome (29516061592).

The spelling of 25505011040 in words is "twenty-five billion, five hundred five million, eleven thousand, forty".