520405545413 has 4 divisors (see below), whose sum is σ = 560436741228. Its totient is φ = 480374349600.

The previous prime is 520405545409. The next prime is 520405545463. The reversal of 520405545413 is 314545504025.

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 85733011204 + 434672534209 = 292802^2 + 659297^2 .

It is a cyclic number.

It is not a de Polignac number, because 520405545413 - 2² = 520405545409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520405545463) 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, 20015597888 + ... + 20015597913.

It is an arithmetic number, because the mean of its divisors is an integer number (140109185307).

Almost surely, 2^520405545413 is an apocalyptic number.

It is an amenable number.

520405545413 is a deficient number, since it is larger than the sum of its proper divisors (40031195815).

520405545413 is a wasteful number, since it uses less digits than its factorization.

520405545413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40031195814.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 520405545413 in words is "five hundred twenty billion, four hundred five million, five hundred forty-five thousand, four hundred thirteen".