2630581309 has 4 divisors (see below), whose sum is σ = 2785321404. Its totient is φ = 2475841216.

The previous prime is 2630581243. The next prime is 2630581313. The reversal of 2630581309 is 9031850362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9031850362 = 2 ⋅4515925181.

It can be written as a sum of positive squares in 2 ways, for example, as 1987198084 + 643383225 = 44578^2 + 25365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2630581309 - 2¹⁷ = 2630450237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2630581319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77370022 + ... + 77370055.

It is an arithmetic number, because the mean of its divisors is an integer number (696330351).

Almost surely, 2^2630581309 is an apocalyptic number.

It is an amenable number.

2630581309 is a deficient number, since it is larger than the sum of its proper divisors (154740095).

2630581309 is a wasteful number, since it uses less digits than its factorization.

2630581309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154740094.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2630581309 is about 51289.1929064983. The cubic root of 2630581309 is about 1380.4390728113.

The spelling of 2630581309 in words is "two billion, six hundred thirty million, five hundred eighty-one thousand, three hundred nine".