25489904677 has 2 divisors, whose sum is σ = 25489904678. Its totient is φ = 25489904676.

The previous prime is 25489904639. The next prime is 25489904701. The reversal of 25489904677 is 77640998452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19870003521 + 5619901156 = 140961^2 + 74966^2 .

It is a cyclic number.

It is not a de Polignac number, because 25489904677 - 2³¹ = 23342421029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25489304677) 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, 12744952338 + 12744952339.

It is an arithmetic number, because the mean of its divisors is an integer number (12744952339).

Almost surely, 2^25489904677 is an apocalyptic number.

It is an amenable number.

25489904677 is a deficient number, since it is larger than the sum of its proper divisors (1).

25489904677 is an equidigital number, since it uses as much as digits as its factorization.

25489904677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 25489904677 in words is "twenty-five billion, four hundred eighty-nine million, nine hundred four thousand, six hundred seventy-seven".