2530391809 has 27 divisors (see below), whose sum is σ = 2965596361. Its totient is φ = 2156992640.

The previous prime is 2530391807. The next prime is 2530391819. The reversal of 2530391809 is 9081930352.

The square root of 2530391809 is 50303.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 132135025 + 2398256784 = 11495^2 + 48972^2 .

It is not a de Polignac number, because 2530391809 - 2¹ = 2530391807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2530391807) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9406527 + ... + 9406795.

Almost surely, 2^2530391809 is an apocalyptic number.

2530391809 is the 50303-rd square number.

2530391809 is the 25152-nd centered octagonal number.

It is an amenable number.

2530391809 is a deficient number, since it is larger than the sum of its proper divisors (435204552).

2530391809 is an equidigital number, since it uses as much as digits as its factorization.

2530391809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The cubic root of 2530391809 is about 1362.6864087912.

The spelling of 2530391809 in words is "two billion, five hundred thirty million, three hundred ninety-one thousand, eight hundred nine".