25227272729 has 2 divisors, whose sum is σ = 25227272730. Its totient is φ = 25227272728.

The previous prime is 25227272717. The next prime is 25227272801. The reversal of 25227272729 is 92727272252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12825109504 + 12402163225 = 113248^2 + 111365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25227272729 is a prime.

It is not a weakly prime, because it can be changed into another prime (25227272029) 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, 12613636364 + 12613636365.

It is an arithmetic number, because the mean of its divisors is an integer number (12613636365).

Almost surely, 2^25227272729 is an apocalyptic number.

It is an amenable number.

25227272729 is a deficient number, since it is larger than the sum of its proper divisors (1).

25227272729 is an equidigital number, since it uses as much as digits as its factorization.

25227272729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 47.

The spelling of 25227272729 in words is "twenty-five billion, two hundred twenty-seven million, two hundred seventy-two thousand, seven hundred twenty-nine".