25418952289 has 2 divisors, whose sum is σ = 25418952290. Its totient is φ = 25418952288.

The previous prime is 25418952281. The next prime is 25418952397. The reversal of 25418952289 is 98225981452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21194992225 + 4223960064 = 145585^2 + 64992^2 .

It is a cyclic number.

It is not a de Polignac number, because 25418952289 - 2³ = 25418952281 is a prime.

It is a super-2 number, since 2×25418952289² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25418952281) 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, 12709476144 + 12709476145.

It is an arithmetic number, because the mean of its divisors is an integer number (12709476145).

Almost surely, 2^25418952289 is an apocalyptic number.

It is an amenable number.

25418952289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25418952289 is an equidigital number, since it uses as much as digits as its factorization.

25418952289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 55.

The spelling of 25418952289 in words is "twenty-five billion, four hundred eighteen million, nine hundred fifty-two thousand, two hundred eighty-nine".