2520605491 has 2 divisors, whose sum is σ = 2520605492. Its totient is φ = 2520605490.

The previous prime is 2520605411. The next prime is 2520605497. The reversal of 2520605491 is 1945060252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2520605491 - 2²⁷ = 2386387763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2520605497) 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 as a sum of consecutive naturals, namely, 1260302745 + 1260302746.

It is an arithmetic number, because the mean of its divisors is an integer number (1260302746).

Almost surely, 2^2520605491 is an apocalyptic number.

2520605491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520605491 is an equidigital number, since it uses as much as digits as its factorization.

2520605491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2520605491 is about 50205.6320645403. The cubic root of 2520605491 is about 1360.9274043182.

The spelling of 2520605491 in words is "two billion, five hundred twenty million, six hundred five thousand, four hundred ninety-one".