25454443541 has 4 divisors (see below), whose sum is σ = 25454884800. Its totient is φ = 25454002284.

The previous prime is 25454443523. The next prime is 25454443561. The reversal of 25454443541 is 14534445452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25454443541 - 2⁶ = 25454443477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25454443561) 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, 118271 + ... + 254748.

It is an arithmetic number, because the mean of its divisors is an integer number (6363721200).

Almost surely, 2^25454443541 is an apocalyptic number.

It is an amenable number.

25454443541 is a deficient number, since it is larger than the sum of its proper divisors (441259).

25454443541 is an equidigital number, since it uses as much as digits as its factorization.

25454443541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441258.

The product of its digits is 768000, while the sum is 41.

Adding to 25454443541 its reverse (14534445452), we get a palindrome (39988888993).

The spelling of 25454443541 in words is "twenty-five billion, four hundred fifty-four million, four hundred forty-three thousand, five hundred forty-one".