25053453521 has 8 divisors (see below), whose sum is σ = 25163767200. Its totient is φ = 24943373280.

The previous prime is 25053453511. The next prime is 25053453569. The reversal of 25053453521 is 12535435052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25053453521 - 2²⁶ = 24986344657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25053453511) by changing a digit.

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, 158525 + ... + 274293.

It is an arithmetic number, because the mean of its divisors is an integer number (3145470900).

Almost surely, 2^25053453521 is an apocalyptic number.

It is an amenable number.

25053453521 is a deficient number, since it is larger than the sum of its proper divisors (110313679).

25053453521 is a wasteful number, since it uses less digits than its factorization.

25053453521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116719.

The product of its (nonzero) digits is 90000, while the sum is 35.

Adding to 25053453521 its reverse (12535435052), we get a palindrome (37588888573).

The spelling of 25053453521 in words is "twenty-five billion, fifty-three million, four hundred fifty-three thousand, five hundred twenty-one".