129185155027 has 2 divisors, whose sum is σ = 129185155028. Its totient is φ = 129185155026.

The previous prime is 129185155009. The next prime is 129185155031. The reversal of 129185155027 is 720551581921.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (720551581921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129185155027 is a prime.

It is not a weakly prime, because it can be changed into another prime (129185155037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64592577513 + 64592577514.

It is an arithmetic number, because the mean of its divisors is an integer number (64592577514).

Almost surely, 2^129185155027 is an apocalyptic number.

129185155027 is a deficient number, since it is larger than the sum of its proper divisors (1).

129185155027 is an equidigital number, since it uses as much as digits as its factorization.

129185155027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 46.

The spelling of 129185155027 in words is "one hundred twenty-nine billion, one hundred eighty-five million, one hundred fifty-five thousand, twenty-seven".