25354351513 has 2 divisors, whose sum is σ = 25354351514. Its totient is φ = 25354351512.

The previous prime is 25354351481. The next prime is 25354351549. The reversal of 25354351513 is 31515345352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24764687424 + 589664089 = 157368^2 + 24283^2 .

It is a cyclic number.

It is not a de Polignac number, because 25354351513 - 2⁵ = 25354351481 is a prime.

It is not a weakly prime, because it can be changed into another prime (25354355513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677175756 + 12677175757.

It is an arithmetic number, because the mean of its divisors is an integer number (12677175757).

Almost surely, 2^25354351513 is an apocalyptic number.

It is an amenable number.

25354351513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25354351513 is an equidigital number, since it uses as much as digits as its factorization.

25354351513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 37.

Adding to 25354351513 its reverse (31515345352), we get a palindrome (56869696865).

The spelling of 25354351513 in words is "twenty-five billion, three hundred fifty-four million, three hundred fifty-one thousand, five hundred thirteen".