2540555305 has 4 divisors (see below), whose sum is σ = 3048666372. Its totient is φ = 2032444240.

The previous prime is 2540555287. The next prime is 2540555333. The reversal of 2540555305 is 5035550452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610534681 + 1930020624 = 24709^2 + 43932^2 .

It is not a de Polignac number, because 2540555305 - 2⁵ = 2540555273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 254055526 + ... + 254055535.

It is an arithmetic number, because the mean of its divisors is an integer number (762166593).

Almost surely, 2^2540555305 is an apocalyptic number.

It is an amenable number.

2540555305 is a deficient number, since it is larger than the sum of its proper divisors (508111067).

2540555305 is an equidigital number, since it uses as much as digits as its factorization.

2540555305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508111066.

The product of its (nonzero) digits is 75000, while the sum is 34.

The square root of 2540555305 is about 50403.9215240243. The cubic root of 2540555305 is about 1364.5084133750.

The spelling of 2540555305 in words is "two billion, five hundred forty million, five hundred fifty-five thousand, three hundred five".