25421033512445 has 4 divisors (see below), whose sum is σ = 30505240214940. Its totient is φ = 20336826809952.

The previous prime is 25421033512429. The next prime is 25421033512477. The reversal of 25421033512445 is 54421533012452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9646807376761 + 15774226135684 = 3105931^2 + 3971678^2 .

It is a cyclic number.

It is not a de Polignac number, because 25421033512445 - 2⁴ = 25421033512429 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542103351240 + ... + 2542103351249.

It is an arithmetic number, because the mean of its divisors is an integer number (7626310053735).

Almost surely, 2^{25421033512445} is an apocalyptic number.

It is an amenable number.

25421033512445 is a deficient number, since it is larger than the sum of its proper divisors (5084206702495).

25421033512445 is an equidigital number, since it uses as much as digits as its factorization.

25421033512445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084206702494.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 25421033512445 its reverse (54421533012452), we get a palindrome (79842566524897).

The spelling of 25421033512445 in words is "twenty-five trillion, four hundred twenty-one billion, thirty-three million, five hundred twelve thousand, four hundred forty-five".