25431366441541 has 2 divisors, whose sum is σ = 25431366441542. Its totient is φ = 25431366441540.

The previous prime is 25431366441539. The next prime is 25431366441557. The reversal of 25431366441541 is 14514466313452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25429367904516 + 1998537025 = 5042754^2 + 44705^2 .

It is a cyclic number.

It is not a de Polignac number, because 25431366441541 - 2¹ = 25431366441539 is a prime.

Together with 25431366441539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25431366541541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715683220770 + 12715683220771.

It is an arithmetic number, because the mean of its divisors is an integer number (12715683220771).

Almost surely, 2^{25431366441541} is an apocalyptic number.

It is an amenable number.

25431366441541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25431366441541 is an equidigital number, since it uses as much as digits as its factorization.

25431366441541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4147200, while the sum is 49.

The spelling of 25431366441541 in words is "twenty-five trillion, four hundred thirty-one billion, three hundred sixty-six million, four hundred forty-one thousand, five hundred forty-one".