25929508939489 has 2 divisors, whose sum is σ = 25929508939490. Its totient is φ = 25929508939488.

The previous prime is 25929508939469. The next prime is 25929508939507. The reversal of 25929508939489 is 98493980592952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25416268517025 + 513240422464 = 5041455^2 + 716408^2 .

It is a cyclic number.

It is not a de Polignac number, because 25929508939489 - 2¹⁹ = 25929508415201 is a prime.

It is a super-2 number, since 2×25929508939489² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25929508939459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12964754469744 + 12964754469745.

It is an arithmetic number, because the mean of its divisors is an integer number (12964754469745).

Almost surely, 2^{25929508939489} is an apocalyptic number.

It is an amenable number.

25929508939489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25929508939489 is an equidigital number, since it uses as much as digits as its factorization.

25929508939489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4534963200, while the sum is 82.

The spelling of 25929508939489 in words is "twenty-five trillion, nine hundred twenty-nine billion, five hundred eight million, nine hundred thirty-nine thousand, four hundred eighty-nine".