520436540545 has 8 divisors (see below), whose sum is σ = 646059153960. Its totient is φ = 401992362240.

The previous prime is 520436540513. The next prime is 520436540597. The reversal of 520436540545 is 545045634025.

It can be written as a sum of positive squares in 4 ways, for example, as 107080127361 + 413356413184 = 327231^2 + 642928^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520436540545 - 2⁵ = 520436540513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794608616 + ... + 1794608905.

It is an arithmetic number, because the mean of its divisors is an integer number (80757394245).

Almost surely, 2^520436540545 is an apocalyptic number.

It is an amenable number.

520436540545 is a deficient number, since it is larger than the sum of its proper divisors (125622613415).

520436540545 is a wasteful number, since it uses less digits than its factorization.

520436540545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589217555.

The product of its (nonzero) digits is 1440000, while the sum is 43.

The spelling of 520436540545 in words is "five hundred twenty billion, four hundred thirty-six million, five hundred forty thousand, five hundred forty-five".