1980606609 has 12 divisors (see below), whose sum is σ = 2862677376. Its totient is φ = 1319573112.

The previous prime is 1980606601. The next prime is 1980606619. The reversal of 1980606609 is 9066060891.

It is not a de Polignac number, because 1980606609 - 2³ = 1980606601 is a prime.

It is a super-2 number, since 2×1980606609² = 7845605079228957762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1980606601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54009 + ... + 82934.

It is an arithmetic number, because the mean of its divisors is an integer number (238556448).

Almost surely, 2^1980606609 is an apocalyptic number.

It is an amenable number.

1980606609 is a deficient number, since it is larger than the sum of its proper divisors (882070767).

1980606609 is a wasteful number, since it uses less digits than its factorization.

1980606609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138556 (or 138553 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1980606609 is about 44504.0066623220. The cubic root of 1980606609 is about 1255.8354587978.

The spelling of 1980606609 in words is "one billion, nine hundred eighty million, six hundred six thousand, six hundred nine".