2520605409 has 16 divisors (see below), whose sum is σ = 3841832832. Its totient is φ = 1440004608.

The previous prime is 2520605407. The next prime is 2520605411. The reversal of 2520605409 is 9045060252.

2520605409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2520605407) and next prime (2520605411).

It is not a de Polignac number, because 2520605409 - 2¹ = 2520605407 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2520605409.

It is not an unprimeable number, because it can be changed into a prime (2520605407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96567 + ... + 119859.

It is an arithmetic number, because the mean of its divisors is an integer number (240114552).

Almost surely, 2^2520605409 is an apocalyptic number.

It is an amenable number.

2520605409 is a deficient number, since it is larger than the sum of its proper divisors (1321227423).

2520605409 is a wasteful number, since it uses less digits than its factorization.

2520605409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28456.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 2520605409 is about 50205.6312478989. The cubic root of 2520605409 is about 1360.9273895604.

The spelling of 2520605409 in words is "two billion, five hundred twenty million, six hundred five thousand, four hundred nine".