8020609509 has 48 divisors (see below), whose sum is σ = 12169912832. Its totient is φ = 4690224000.

The previous prime is 8020609507. The next prime is 8020609511. The reversal of 8020609509 is 9059060208.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8020609507) and next prime (8020609511).

It is not a de Polignac number, because 8020609509 - 2¹ = 8020609507 is a prime.

It is a super-2 number, since 2×8020609509² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8020609507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4736667 + ... + 4738359.

Almost surely, 2^8020609509 is an apocalyptic number.

It is an amenable number.

8020609509 is a deficient number, since it is larger than the sum of its proper divisors (4149303323).

8020609509 is a wasteful number, since it uses less digits than its factorization.

8020609509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2159 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 8020609509 is about 89557.8556520867. The cubic root of 8020609509 is about 2001.7159863577.

The spelling of 8020609509 in words is "eight billion, twenty million, six hundred nine thousand, five hundred nine".