129041537529 has 4 divisors (see below), whose sum is σ = 172055383376. Its totient is φ = 86027691684.

The previous prime is 129041537503. The next prime is 129041537531. The reversal of 129041537529 is 925735140921.

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 not a de Polignac number, because 129041537529 - 2¹² = 129041533433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129041533529) 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, 21506922919 + ... + 21506922924.

It is an arithmetic number, because the mean of its divisors is an integer number (43013845844).

Almost surely, 2^129041537529 is an apocalyptic number.

It is an amenable number.

129041537529 is a deficient number, since it is larger than the sum of its proper divisors (43013845847).

129041537529 is an equidigital number, since it uses as much as digits as its factorization.

129041537529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43013845846.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 129041537529 in words is "one hundred twenty-nine billion, forty-one million, five hundred thirty-seven thousand, five hundred twenty-nine".