5820385509 has 6 divisors (see below), whose sum is σ = 8407223526. Its totient is φ = 3880257000.

The previous prime is 5820385499. The next prime is 5820385513. The reversal of 5820385509 is 9055830285.

It can be written as a sum of positive squares in only one way, i.e., 4842072225 + 978313284 = 69585^2 + 31278^2 .

It is not a de Polignac number, because 5820385509 - 2¹¹ = 5820383461 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5820385009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323354742 + ... + 323354759.

It is an arithmetic number, because the mean of its divisors is an integer number (1401203921).

Almost surely, 2^5820385509 is an apocalyptic number.

It is an amenable number.

5820385509 is a deficient number, since it is larger than the sum of its proper divisors (2586838017).

5820385509 is a wasteful number, since it uses less digits than its factorization.

5820385509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646709507 (or 646709504 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 5820385509 is about 76291.4510872614. The cubic root of 5820385509 is about 1798.8042994167.

The spelling of 5820385509 in words is "five billion, eight hundred twenty million, three hundred eighty-five thousand, five hundred nine".