2539980009 has 24 divisors (see below), whose sum is σ = 4328243712. Its totient is φ = 1404596160.

The previous prime is 2539979933. The next prime is 2539980043. The reversal of 2539980009 is 9000899352.

It is not a de Polignac number, because 2539980009 - 2⁸ = 2539979753 is a prime.

It is a super-2 number, since 2×2539980009² = 12902996892239280162, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2539980089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648324 + ... + 652229.

It is an arithmetic number, because the mean of its divisors is an integer number (180343488).

Almost surely, 2^2539980009 is an apocalyptic number.

It is an amenable number.

2539980009 is a deficient number, since it is larger than the sum of its proper divisors (1788263703).

2539980009 is a wasteful number, since it uses less digits than its factorization.

2539980009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300597 (or 1300594 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 2539980009 is about 50398.2143433674. The cubic root of 2539980009 is about 1364.4054102387.

The spelling of 2539980009 in words is "two billion, five hundred thirty-nine million, nine hundred eighty thousand, nine".