129182015489 has 2 divisors, whose sum is σ = 129182015490. Its totient is φ = 129182015488.

The previous prime is 129182015477. The next prime is 129182015503. The reversal of 129182015489 is 984510281921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108966010000 + 20216005489 = 330100^2 + 142183^2 .

It is a cyclic number.

It is not a de Polignac number, because 129182015489 - 2³² = 124887048193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129182015419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64591007744 + 64591007745.

It is an arithmetic number, because the mean of its divisors is an integer number (64591007745).

Almost surely, 2^129182015489 is an apocalyptic number.

It is an amenable number.

129182015489 is a deficient number, since it is larger than the sum of its proper divisors (1).

129182015489 is an equidigital number, since it uses as much as digits as its factorization.

129182015489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 50.

The spelling of 129182015489 in words is "one hundred twenty-nine billion, one hundred eighty-two million, fifteen thousand, four hundred eighty-nine".