25305413540 has 24 divisors (see below), whose sum is σ = 57972402432. Its totient is φ = 9201968480.

The previous prime is 25305413531. The next prime is 25305413723. The reversal of 25305413540 is 4531450352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25305413497 and 25305413506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57512084 + ... + 57512523.

It is an arithmetic number, because the mean of its divisors is an integer number (2415516768).

Almost surely, 2^25305413540 is an apocalyptic number.

25305413540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305413540 is an abundant number, since it is smaller than the sum of its proper divisors (32666988892).

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

25305413540 is a wasteful number, since it uses less digits than its factorization.

25305413540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115024627 (or 115024625 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 25305413540 its reverse (4531450352), we get a palindrome (29836863892).

The spelling of 25305413540 in words is "twenty-five billion, three hundred five million, four hundred thirteen thousand, five hundred forty".