2520605805 has 16 divisors (see below), whose sum is σ = 4039104960. Its totient is φ = 1342277888.

The previous prime is 2520605783. The next prime is 2520605807. The reversal of 2520605805 is 5085060252.

It is a cyclic number.

It is not a de Polignac number, because 2520605805 - 2⁷ = 2520605677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520605807) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 117612 + ... + 137381.

It is an arithmetic number, because the mean of its divisors is an integer number (252444060).

Almost surely, 2^2520605805 is an apocalyptic number.

It is an amenable number.

2520605805 is a deficient number, since it is larger than the sum of its proper divisors (1518499155).

2520605805 is a wasteful number, since it uses less digits than its factorization.

2520605805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255660.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 2520605805 is about 50205.6351916794. The cubic root of 2520605805 is about 1360.9274608299.

The spelling of 2520605805 in words is "two billion, five hundred twenty million, six hundred five thousand, eight hundred five".