25224013440 has 256 divisors, whose sum is σ = 91516521600. Its totient is φ = 6562160640.

The previous prime is 25224013429. The next prime is 25224013453. The reversal of 25224013440 is 4431042252.

25224013440 is a `hidden beast` number, since 2 + 522 + 4 + 0 + 134 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690679 + ... + 726281.

Almost surely, 2^25224013440 is an apocalyptic number.

25224013440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25224013440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45758260800).

25224013440 is an abundant number, since it is smaller than the sum of its proper divisors (66292508160).

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

25224013440 is a wasteful number, since it uses less digits than its factorization.

25224013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35672 (or 35654 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 25224013440 its reverse (4431042252), we get a palindrome (29655055692).

The spelling of 25224013440 in words is "twenty-five billion, two hundred twenty-four million, thirteen thousand, four hundred forty".