25214453440 has 56 divisors (see below), whose sum is σ = 65500282512. Its totient is φ = 9168890880.

The previous prime is 25214453423. The next prime is 25214453441. The reversal of 25214453440 is 4435441252.

It is a junction number, because it is equal to n+sod(n) for n = 25214453396 and 25214453405.

It is not an unprimeable number, because it can be changed into a prime (25214453441) 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, 3578079 + ... + 3585118.

It is an arithmetic number, because the mean of its divisors is an integer number (1169647902).

Almost surely, 2^25214453440 is an apocalyptic number.

25214453440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25214453440 is an abundant number, since it is smaller than the sum of its proper divisors (40285829072).

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

25214453440 is a wasteful number, since it uses less digits than its factorization.

25214453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163225 (or 7163215 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 25214453440 its reverse (4435441252), we get a palindrome (29649894692).

The spelling of 25214453440 in words is "twenty-five billion, two hundred fourteen million, four hundred fifty-three thousand, four hundred forty".