25250450320 has 20 divisors (see below), whose sum is σ = 58707297180. Its totient is φ = 10100180096.

The previous prime is 25250450231. The next prime is 25250450321. The reversal of 25250450320 is 2305405252.

It can be written as a sum of positive squares in 2 ways, for example, as 5677321104 + 19573129216 = 75348^2 + 139904^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (25250450321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157815235 + ... + 157815394.

It is an arithmetic number, because the mean of its divisors is an integer number (2935364859).

Almost surely, 2^25250450320 is an apocalyptic number.

25250450320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25250450320 is an abundant number, since it is smaller than the sum of its proper divisors (33456846860).

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

25250450320 is a wasteful number, since it uses less digits than its factorization.

25250450320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315630642 (or 315630636 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 25250450320 its reverse (2305405252), we get a palindrome (27555855572).

The spelling of 25250450320 in words is "twenty-five billion, two hundred fifty million, four hundred fifty thousand, three hundred twenty".