25440708329 has 2 divisors, whose sum is σ = 25440708330. Its totient is φ = 25440708328.

The previous prime is 25440708299. The next prime is 25440708413. The reversal of 25440708329 is 92380704452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25440250000 + 458329 = 159500^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 25440708329 - 2¹⁶ = 25440642793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25440708329.

It is not a weakly prime, because it can be changed into another prime (25440704329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720354164 + 12720354165.

It is an arithmetic number, because the mean of its divisors is an integer number (12720354165).

Almost surely, 2^25440708329 is an apocalyptic number.

It is an amenable number.

25440708329 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440708329 is an equidigital number, since it uses as much as digits as its factorization.

25440708329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 25440708329 in words is "twenty-five billion, four hundred forty million, seven hundred eight thousand, three hundred twenty-nine".