129449005601 has 16 divisors (see below), whose sum is σ = 136335208320. Its totient is φ = 122780972160.

The previous prime is 129449005591. The next prime is 129449005603. The reversal of 129449005601 is 106500944921.

It is a cyclic number.

It is not a de Polignac number, because 129449005601 - 2⁶ = 129449005537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129449005603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43031 + ... + 510636.

It is an arithmetic number, because the mean of its divisors is an integer number (8520950520).

Almost surely, 2^129449005601 is an apocalyptic number.

It is an amenable number.

129449005601 is a deficient number, since it is larger than the sum of its proper divisors (6886202719).

129449005601 is an equidigital number, since it uses as much as digits as its factorization.

129449005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553864.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 129449005601 in words is "one hundred twenty-nine billion, four hundred forty-nine million, five thousand, six hundred one".