25450550053521 has 8 divisors (see below), whose sum is σ = 34025042789760. Its totient is φ = 16921545343152.

The previous prime is 25450550053501. The next prime is 25450550053529. The reversal of 25450550053521 is 12535005505452.

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

It is a de Polignac number, because none of the positive numbers 2^k-25450550053521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25450550053529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11372005161 + ... + 11372007398.

It is an arithmetic number, because the mean of its divisors is an integer number (4253130348720).

Almost surely, 2^{25450550053521} is an apocalyptic number.

It is an amenable number.

25450550053521 is a deficient number, since it is larger than the sum of its proper divisors (8574492736239).

25450550053521 is a wasteful number, since it uses less digits than its factorization.

25450550053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22744012935.

The product of its (nonzero) digits is 750000, while the sum is 42.

Adding to 25450550053521 its reverse (12535005505452), we get a palindrome (37985555558973).

The spelling of 25450550053521 in words is "twenty-five trillion, four hundred fifty billion, five hundred fifty million, fifty-three thousand, five hundred twenty-one".