129505811038 has 64 divisors (see below), whose sum is σ = 210857411520. Its totient is φ = 59531673600.

The previous prime is 129505811003. The next prime is 129505811059. The reversal of 129505811038 is 830118505921.

It is a super-2 number, since 2×129505811038² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129505810985 and 129505811003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16834773 + ... + 16842463.

It is an arithmetic number, because the mean of its divisors is an integer number (3294647055).

Almost surely, 2^129505811038 is an apocalyptic number.

129505811038 is a deficient number, since it is larger than the sum of its proper divisors (81351600482).

129505811038 is a wasteful number, since it uses less digits than its factorization.

129505811038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7933.

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 129505811038 in words is "one hundred twenty-nine billion, five hundred five million, eight hundred eleven thousand, thirty-eight".