25723881541 has 2 divisors, whose sum is σ = 25723881542. Its totient is φ = 25723881540.

The previous prime is 25723881527. The next prime is 25723881581. The reversal of 25723881541 is 14518832752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25686793441 + 37088100 = 160271^2 + 6090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25723881541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25723881491 and 25723881500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25723881511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861940770 + 12861940771.

It is an arithmetic number, because the mean of its divisors is an integer number (12861940771).

Almost surely, 2^25723881541 is an apocalyptic number.

It is an amenable number.

25723881541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25723881541 is an equidigital number, since it uses as much as digits as its factorization.

25723881541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 46.

The spelling of 25723881541 in words is "twenty-five billion, seven hundred twenty-three million, eight hundred eighty-one thousand, five hundred forty-one".