25254402240 has 224 divisors, whose sum is σ = 82292196096. Its totient is φ = 6558289920.

The previous prime is 25254402227. The next prime is 25254402263. The reversal of 25254402240 is 4220445252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25254402198 and 25254402207.

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, 18286350 + ... + 18287730.

Almost surely, 2^25254402240 is an apocalyptic number.

25254402240 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 25254402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41146098048).

25254402240 is an abundant number, since it is smaller than the sum of its proper divisors (57037793856).

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

25254402240 is a wasteful number, since it uses less digits than its factorization.

25254402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 25254402240 its reverse (4220445252), we get a palindrome (29474847492).

The spelling of 25254402240 in words is "twenty-five billion, two hundred fifty-four million, four hundred two thousand, two hundred forty".