129505811037 has 4 divisors (see below), whose sum is σ = 172674414720. Its totient is φ = 86337207356.

The previous prime is 129505811003. The next prime is 129505811059. The reversal of 129505811037 is 730118505921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129505811037 - 2⁸ = 129505810781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129505811037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129505811077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21584301837 + ... + 21584301842.

It is an arithmetic number, because the mean of its divisors is an integer number (43168603680).

Almost surely, 2^129505811037 is an apocalyptic number.

It is an amenable number.

129505811037 is a deficient number, since it is larger than the sum of its proper divisors (43168603683).

129505811037 is an equidigital number, since it uses as much as digits as its factorization.

129505811037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43168603682.

The product of its (nonzero) digits is 75600, while the sum is 42.

The spelling of 129505811037 in words is "one hundred twenty-nine billion, five hundred five million, eight hundred eleven thousand, thirty-seven".