25553421541 has 2 divisors, whose sum is σ = 25553421542. Its totient is φ = 25553421540.

The previous prime is 25553421533. The next prime is 25553421557. The reversal of 25553421541 is 14512435552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18045892225 + 7507529316 = 134335^2 + 86646^2 .

It is a cyclic number.

It is not a de Polignac number, because 25553421541 - 2³ = 25553421533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25553421541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25553421571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776710770 + 12776710771.

It is an arithmetic number, because the mean of its divisors is an integer number (12776710771).

Almost surely, 2^25553421541 is an apocalyptic number.

It is an amenable number.

25553421541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25553421541 is an equidigital number, since it uses as much as digits as its factorization.

25553421541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 37.

The spelling of 25553421541 in words is "twenty-five billion, five hundred fifty-three million, four hundred twenty-one thousand, five hundred forty-one".