129416068889 has 2 divisors, whose sum is σ = 129416068890. Its totient is φ = 129416068888.

The previous prime is 129416068879. The next prime is 129416068921. The reversal of 129416068889 is 988860614921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110428606864 + 18987462025 = 332308^2 + 137795^2 .

It is a cyclic number.

It is not a de Polignac number, because 129416068889 - 2²⁴ = 129399291673 is a prime.

It is not a weakly prime, because it can be changed into another prime (129416068819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64708034444 + 64708034445.

It is an arithmetic number, because the mean of its divisors is an integer number (64708034445).

Almost surely, 2^129416068889 is an apocalyptic number.

It is an amenable number.

129416068889 is a deficient number, since it is larger than the sum of its proper divisors (1).

129416068889 is an equidigital number, since it uses as much as digits as its factorization.

129416068889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The spelling of 129416068889 in words is "one hundred twenty-nine billion, four hundred sixteen million, sixty-eight thousand, eight hundred eighty-nine".