2639080405 has 8 divisors (see below), whose sum is σ = 3410503992. Its totient is φ = 1948859328.

The previous prime is 2639080403. The next prime is 2639080429. The reversal of 2639080405 is 5040809362.

It can be written as a sum of positive squares in 4 ways, for example, as 28483569 + 2610596836 = 5337^2 + 51094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2639080405 - 2¹ = 2639080403 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 (2639080403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20300554 + ... + 20300683.

It is an arithmetic number, because the mean of its divisors is an integer number (426312999).

Almost surely, 2^2639080405 is an apocalyptic number.

It is an amenable number.

2639080405 is a deficient number, since it is larger than the sum of its proper divisors (771423587).

2639080405 is a wasteful number, since it uses less digits than its factorization.

2639080405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40601255.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2639080405 is about 51371.9807385310. The cubic root of 2639080405 is about 1381.9241528545.

Adding to 2639080405 its reverse (5040809362), we get a palindrome (7679889767).

The spelling of 2639080405 in words is "two billion, six hundred thirty-nine million, eighty thousand, four hundred five".