25261551313 has 2 divisors, whose sum is σ = 25261551314. Its totient is φ = 25261551312.

The previous prime is 25261551311. The next prime is 25261551317. The reversal of 25261551313 is 31315516252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24443133649 + 818417664 = 156343^2 + 28608^2 .

It is a cyclic number.

It is not a de Polignac number, because 25261551313 - 2¹ = 25261551311 is a prime.

Together with 25261551311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25261551311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12630775656 + 12630775657.

It is an arithmetic number, because the mean of its divisors is an integer number (12630775657).

Almost surely, 2^25261551313 is an apocalyptic number.

It is an amenable number.

25261551313 is a deficient number, since it is larger than the sum of its proper divisors (1).

25261551313 is an equidigital number, since it uses as much as digits as its factorization.

25261551313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The spelling of 25261551313 in words is "twenty-five billion, two hundred sixty-one million, five hundred fifty-one thousand, three hundred thirteen".