129515752033 has 4 divisors (see below), whose sum is σ = 137134325700. Its totient is φ = 121897178368.

The previous prime is 129515752031. The next prime is 129515752039. The reversal of 129515752033 is 330257515921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330257515921 = 43 ⋅7680407347.

It can be written as a sum of positive squares in 2 ways, for example, as 78653324304 + 50862427729 = 280452^2 + 225527^2 .

It is a cyclic number.

It is not a de Polignac number, because 129515752033 - 2¹ = 129515752031 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129515752031) 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, 3809286808 + ... + 3809286841.

It is an arithmetic number, because the mean of its divisors is an integer number (34283581425).

Almost surely, 2^129515752033 is an apocalyptic number.

It is an amenable number.

129515752033 is a deficient number, since it is larger than the sum of its proper divisors (7618573667).

129515752033 is an equidigital number, since it uses as much as digits as its factorization.

129515752033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618573666.

The product of its (nonzero) digits is 283500, while the sum is 43.

The spelling of 129515752033 in words is "one hundred twenty-nine billion, five hundred fifteen million, seven hundred fifty-two thousand, thirty-three".