2520540845 has 4 divisors (see below), whose sum is σ = 3024649020. Its totient is φ = 2016432672.

The previous prime is 2520540811. The next prime is 2520540877. The reversal of 2520540845 is 5480450252.

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 1786076644 + 734464201 = 42262^2 + 27101^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520540845 - 2¹² = 2520536749 is a prime.

It is a congruent 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, 252054080 + ... + 252054089.

It is an arithmetic number, because the mean of its divisors is an integer number (756162255).

Almost surely, 2^2520540845 is an apocalyptic number.

It is an amenable number.

2520540845 is a deficient number, since it is larger than the sum of its proper divisors (504108175).

2520540845 is an equidigital number, since it uses as much as digits as its factorization.

2520540845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504108174.

The product of its (nonzero) digits is 64000, while the sum is 35.

The square root of 2520540845 is about 50204.9882481811. The cubic root of 2520540845 is about 1360.9157696448.

The spelling of 2520540845 in words is "two billion, five hundred twenty million, five hundred forty thousand, eight hundred forty-five".