520474885129 has 4 divisors (see below), whose sum is σ = 520490403076. Its totient is φ = 520459367184.

The previous prime is 520474885127. The next prime is 520474885153. The reversal of 520474885129 is 921588474025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178208933904 + 342265951225 = 422148^2 + 585035^2 .

It is a cyclic number.

It is not a de Polignac number, because 520474885129 - 2¹ = 520474885127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520474885129.

It is not an unprimeable number, because it can be changed into a prime (520474885127) 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, 7708554 + ... + 7775779.

It is an arithmetic number, because the mean of its divisors is an integer number (130122600769).

Almost surely, 2^520474885129 is an apocalyptic number.

It is an amenable number.

520474885129 is a deficient number, since it is larger than the sum of its proper divisors (15517947).

520474885129 is a wasteful number, since it uses less digits than its factorization.

520474885129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15517946.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 520474885129 in words is "five hundred twenty billion, four hundred seventy-four million, eight hundred eighty-five thousand, one hundred twenty-nine".