25313316440 has 32 divisors (see below), whose sum is σ = 57250082880. Its totient is φ = 10072860672.

The previous prime is 25313316349. The next prime is 25313316443. The reversal of 25313316440 is 4461331352.

It is a junction number, because it is equal to n+sod(n) for n = 25313316397 and 25313316406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25313316443) 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, 1631744 + ... + 1647183.

It is an arithmetic number, because the mean of its divisors is an integer number (1789065090).

Almost surely, 2^25313316440 is an apocalyptic number.

25313316440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25313316440 is an abundant number, since it is smaller than the sum of its proper divisors (31936766440).

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

25313316440 is a wasteful number, since it uses less digits than its factorization.

25313316440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279131 (or 3279127 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 25313316440 its reverse (4461331352), we get a palindrome (29774647792).

The spelling of 25313316440 in words is "twenty-five billion, three hundred thirteen million, three hundred sixteen thousand, four hundred forty".