25424247913 has 2 divisors, whose sum is σ = 25424247914. Its totient is φ = 25424247912.

The previous prime is 25424247883. The next prime is 25424247931. The reversal of 25424247913 is 31974242452.

Together with next prime (25424247931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17784089449 + 7640158464 = 133357^2 + 87408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25424247913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25424247913.

It is not a weakly prime, because it can be changed into another prime (25424247113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12712123956 + 12712123957.

It is an arithmetic number, because the mean of its divisors is an integer number (12712123957).

Almost surely, 2^25424247913 is an apocalyptic number.

It is an amenable number.

25424247913 is a deficient number, since it is larger than the sum of its proper divisors (1).

25424247913 is an equidigital number, since it uses as much as digits as its factorization.

25424247913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 43.

The spelling of 25424247913 in words is "twenty-five billion, four hundred twenty-four million, two hundred forty-seven thousand, nine hundred thirteen".