2520638789 has 2 divisors, whose sum is σ = 2520638790. Its totient is φ = 2520638788.

The previous prime is 2520638759. The next prime is 2520638851. The reversal of 2520638789 is 9878360252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2463136900 + 57501889 = 49630^2 + 7583^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520638789 - 2²⁴ = 2503861573 is a prime.

It is a super-2 number, since 2×2520638789² = 12707239809222773042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520638749) 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, 1260319394 + 1260319395.

It is an arithmetic number, because the mean of its divisors is an integer number (1260319395).

Almost surely, 2^2520638789 is an apocalyptic number.

It is an amenable number.

2520638789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520638789 is an equidigital number, since it uses as much as digits as its factorization.

2520638789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 2520638789 is about 50205.9636796267. The cubic root of 2520638789 is about 1360.9333970531.

The spelling of 2520638789 in words is "two billion, five hundred twenty million, six hundred thirty-eight thousand, seven hundred eighty-nine".