520988716645 has 8 divisors (see below), whose sum is σ = 632211027480. Its totient is φ = 412107928320.

The previous prime is 520988716637. The next prime is 520988716663. The reversal of 520988716645 is 546617889025.

It can be written as a sum of positive squares in 4 ways, for example, as 948701601 + 520040015044 = 30801^2 + 721138^2 .

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

It is not a de Polignac number, because 520988716645 - 2³ = 520988716637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585380136 + ... + 585381025.

It is an arithmetic number, because the mean of its divisors is an integer number (79026378435).

Almost surely, 2^520988716645 is an apocalyptic number.

It is an amenable number.

520988716645 is a deficient number, since it is larger than the sum of its proper divisors (111222310835).

520988716645 is a wasteful number, since it uses less digits than its factorization.

520988716645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170761255.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 520988716645 in words is "five hundred twenty billion, nine hundred eighty-eight million, seven hundred sixteen thousand, six hundred forty-five".