2540518009 has 4 divisors (see below), whose sum is σ = 2543546880. Its totient is φ = 2537489140.

The previous prime is 2540518007. The next prime is 2540518031. The reversal of 2540518009 is 9008150452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2540518009 - 2¹ = 2540518007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540518003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513177 + ... + 1514854.

It is an arithmetic number, because the mean of its divisors is an integer number (635886720).

Almost surely, 2^2540518009 is an apocalyptic number.

It is an amenable number.

2540518009 is a deficient number, since it is larger than the sum of its proper divisors (3028871).

2540518009 is an equidigital number, since it uses as much as digits as its factorization.

2540518009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028870.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 2540518009 is about 50403.5515514532. The cubic root of 2540518009 is about 1364.5017362318.

The spelling of 2540518009 in words is "two billion, five hundred forty million, five hundred eighteen thousand, nine".