25322635861 has 2 divisors, whose sum is σ = 25322635862. Its totient is φ = 25322635860.

The previous prime is 25322635847. The next prime is 25322635937. The reversal of 25322635861 is 16853622352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21675200625 + 3647435236 = 147225^2 + 60394^2 .

It is a cyclic number.

It is not a de Polignac number, because 25322635861 - 2¹⁵ = 25322603093 is a prime.

It is a super-2 number, since 2×25322635861² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25322635061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12661317930 + 12661317931.

It is an arithmetic number, because the mean of its divisors is an integer number (12661317931).

Almost surely, 2^25322635861 is an apocalyptic number.

It is an amenable number.

25322635861 is a deficient number, since it is larger than the sum of its proper divisors (1).

25322635861 is an equidigital number, since it uses as much as digits as its factorization.

25322635861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 43.

The spelling of 25322635861 in words is "twenty-five billion, three hundred twenty-two million, six hundred thirty-five thousand, eight hundred sixty-one".