129905438533 has 32 divisors (see below), whose sum is σ = 143804045952. Its totient is φ = 116613907200.

The previous prime is 129905438521. The next prime is 129905438567. The reversal of 129905438533 is 335834509921.

It is not a de Polignac number, because 129905438533 - 2⁵ = 129905438501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129905438513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54558003 + ... + 54560383.

It is an arithmetic number, because the mean of its divisors is an integer number (4493876436).

Almost surely, 2^129905438533 is an apocalyptic number.

129905438533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129905438533 is a deficient number, since it is larger than the sum of its proper divisors (13898607419).

129905438533 is a wasteful number, since it uses less digits than its factorization.

129905438533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 129905438533 in words is "one hundred twenty-nine billion, nine hundred five million, four hundred thirty-eight thousand, five hundred thirty-three".