129127515139 has 6 divisors (see below), whose sum is σ = 150209558484. Its totient is φ = 110680727220.

The previous prime is 129127515137. The next prime is 129127515151. The reversal of 129127515139 is 931515721921.

It is not a de Polignac number, because 129127515139 - 2¹ = 129127515137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129127515137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1317627657 + ... + 1317627754.

It is an arithmetic number, because the mean of its divisors is an integer number (25034926414).

Almost surely, 2^129127515139 is an apocalyptic number.

129127515139 is a deficient number, since it is larger than the sum of its proper divisors (21082043345).

129127515139 is an equidigital number, since it uses as much as digits as its factorization.

129127515139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635255425 (or 2635255418 counting only the distinct ones).

The product of its digits is 170100, while the sum is 46.

The spelling of 129127515139 in words is "one hundred twenty-nine billion, one hundred twenty-seven million, five hundred fifteen thousand, one hundred thirty-nine".