129323052465 has 16 divisors (see below), whose sum is σ = 209050050048. Its totient is φ = 68261239296.

The previous prime is 129323052461. The next prime is 129323052473. The reversal of 129323052465 is 564250323921.

It is not a de Polignac number, because 129323052465 - 2² = 129323052461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129323052461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44439457 + ... + 44442366.

It is an arithmetic number, because the mean of its divisors is an integer number (13065628128).

Almost surely, 2^129323052465 is an apocalyptic number.

129323052465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129323052465 is a deficient number, since it is larger than the sum of its proper divisors (79726997583).

129323052465 is an equidigital number, since it uses as much as digits as its factorization.

129323052465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88881928.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 129323052465 in words is "one hundred twenty-nine billion, three hundred twenty-three million, fifty-two thousand, four hundred sixty-five".