520165645 has 8 divisors (see below), whose sum is σ = 624395520. Its totient is φ = 416001360.

The previous prime is 520165637. The next prime is 520165669. The reversal of 520165645 is 546561025.

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

It is not a de Polignac number, because 520165645 - 2³ = 520165637 is a prime.

It is a super-3 number, since 3×520165645³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520165645.

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, 3180 + ... + 32410.

It is an arithmetic number, because the mean of its divisors is an integer number (78049440).

Almost surely, 2^520165645 is an apocalyptic number.

It is an amenable number.

520165645 is a deficient number, since it is larger than the sum of its proper divisors (104229875).

520165645 is a wasteful number, since it uses less digits than its factorization.

520165645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32795.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 520165645 is about 22807.1402196768. The cubic root of 520165645 is about 804.2305289501.

The spelling of 520165645 in words is "five hundred twenty million, one hundred sixty-five thousand, six hundred forty-five".