129444475267 has 2 divisors, whose sum is σ = 129444475268. Its totient is φ = 129444475266.

The previous prime is 129444475241. The next prime is 129444475297. The reversal of 129444475267 is 762574444921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129444475267 - 2²⁷ = 129310257539 is a prime.

It is not a weakly prime, because it can be changed into another prime (129444475207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64722237633 + 64722237634.

It is an arithmetic number, because the mean of its divisors is an integer number (64722237634).

Almost surely, 2^129444475267 is an apocalyptic number.

129444475267 is a deficient number, since it is larger than the sum of its proper divisors (1).

129444475267 is an equidigital number, since it uses as much as digits as its factorization.

129444475267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13547520, while the sum is 55.

The spelling of 129444475267 in words is "one hundred twenty-nine billion, four hundred forty-four million, four hundred seventy-five thousand, two hundred sixty-seven".