25409068361 has 2 divisors, whose sum is σ = 25409068362. Its totient is φ = 25409068360.

The previous prime is 25409068351. The next prime is 25409068441. The reversal of 25409068361 is 16386090452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24537342736 + 871725625 = 156644^2 + 29525^2 .

It is a cyclic number.

It is not a de Polignac number, because 25409068361 - 2⁶ = 25409068297 is a prime.

It is not a weakly prime, because it can be changed into another prime (25409068351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12704534180 + 12704534181.

It is an arithmetic number, because the mean of its divisors is an integer number (12704534181).

Almost surely, 2^25409068361 is an apocalyptic number.

It is an amenable number.

25409068361 is a deficient number, since it is larger than the sum of its proper divisors (1).

25409068361 is an equidigital number, since it uses as much as digits as its factorization.

25409068361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 25409068361 in words is "twenty-five billion, four hundred nine million, sixty-eight thousand, three hundred sixty-one".