25788248657 has 2 divisors, whose sum is σ = 25788248658. Its totient is φ = 25788248656.

The previous prime is 25788248639. The next prime is 25788248701. The reversal of 25788248657 is 75684288752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23481271696 + 2306976961 = 153236^2 + 48031^2 .

It is a cyclic number.

It is not a de Polignac number, because 25788248657 - 2¹⁴ = 25788232273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25788248657.

It is not a weakly prime, because it can be changed into another prime (25788245657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12894124328 + 12894124329.

It is an arithmetic number, because the mean of its divisors is an integer number (12894124329).

Almost surely, 2^25788248657 is an apocalyptic number.

It is an amenable number.

25788248657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25788248657 is an equidigital number, since it uses as much as digits as its factorization.

25788248657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60211200, while the sum is 62.

The spelling of 25788248657 in words is "twenty-five billion, seven hundred eighty-eight million, two hundred forty-eight thousand, six hundred fifty-seven".