25434106109 has 2 divisors, whose sum is σ = 25434106110. Its totient is φ = 25434106108.

The previous prime is 25434106051. The next prime is 25434106121. The reversal of 25434106109 is 90160143452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14943840025 + 10490266084 = 122245^2 + 102422^2 .

It is a cyclic number.

It is not a de Polignac number, because 25434106109 - 2²⁸ = 25165670653 is a prime.

It is a super-2 number, since 2×25434106109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25434106199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12717053054 + 12717053055.

It is an arithmetic number, because the mean of its divisors is an integer number (12717053055).

Almost surely, 2^25434106109 is an apocalyptic number.

It is an amenable number.

25434106109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25434106109 is an equidigital number, since it uses as much as digits as its factorization.

25434106109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 25434106109 in words is "twenty-five billion, four hundred thirty-four million, one hundred six thousand, one hundred nine".