25642303213 has 2 divisors, whose sum is σ = 25642303214. Its totient is φ = 25642303212.

The previous prime is 25642303163. The next prime is 25642303307. The reversal of 25642303213 is 31230324652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19663611529 + 5978691684 = 140227^2 + 77322^2 .

It is a cyclic number.

It is not a de Polignac number, because 25642303213 - 2²¹ = 25640206061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25642303513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821151606 + 12821151607.

It is an arithmetic number, because the mean of its divisors is an integer number (12821151607).

Almost surely, 2^25642303213 is an apocalyptic number.

It is an amenable number.

25642303213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25642303213 is an equidigital number, since it uses as much as digits as its factorization.

25642303213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 25642303213 its reverse (31230324652), we get a palindrome (56872627865).

The spelling of 25642303213 in words is "twenty-five billion, six hundred forty-two million, three hundred three thousand, two hundred thirteen".