25158121189 has 2 divisors, whose sum is σ = 25158121190. Its totient is φ = 25158121188.

The previous prime is 25158121187. The next prime is 25158121243. The reversal of 25158121189 is 98112185152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18705212289 + 6452908900 = 136767^2 + 80330^2 .

It is a cyclic number.

It is not a de Polignac number, because 25158121189 - 2¹ = 25158121187 is a prime.

Together with 25158121187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25158121187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12579060594 + 12579060595.

It is an arithmetic number, because the mean of its divisors is an integer number (12579060595).

Almost surely, 2^25158121189 is an apocalyptic number.

It is an amenable number.

25158121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25158121189 is an equidigital number, since it uses as much as digits as its factorization.

25158121189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 43.

The spelling of 25158121189 in words is "twenty-five billion, one hundred fifty-eight million, one hundred twenty-one thousand, one hundred eighty-nine".