25513433441 has 2 divisors, whose sum is σ = 25513433442. Its totient is φ = 25513433440.

The previous prime is 25513433437. The next prime is 25513433467. The reversal of 25513433441 is 14433431552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15293032225 + 10220401216 = 123665^2 + 101096^2 .

It is a cyclic number.

It is not a de Polignac number, because 25513433441 - 2² = 25513433437 is a prime.

It is not a weakly prime, because it can be changed into another prime (25513433431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756716720 + 12756716721.

It is an arithmetic number, because the mean of its divisors is an integer number (12756716721).

Almost surely, 2^25513433441 is an apocalyptic number.

It is an amenable number.

25513433441 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513433441 is an equidigital number, since it uses as much as digits as its factorization.

25513433441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 35.

Adding to 25513433441 its reverse (14433431552), we get a palindrome (39946864993).

The spelling of 25513433441 in words is "twenty-five billion, five hundred thirteen million, four hundred thirty-three thousand, four hundred forty-one".