2638326631 has 4 divisors (see below), whose sum is σ = 2639725200. Its totient is φ = 2636928064.

The previous prime is 2638326629. The next prime is 2638326661. The reversal of 2638326631 is 1366238362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2638326631 - 2¹ = 2638326629 is a prime.

It is a super-2 number, since 2×2638326631² = 13921534823687620322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638326601) 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 in 3 ways as a sum of consecutive naturals, for example, 696451 + ... + 700228.

It is an arithmetic number, because the mean of its divisors is an integer number (659931300).

Almost surely, 2^2638326631 is an apocalyptic number.

2638326631 is a deficient number, since it is larger than the sum of its proper divisors (1398569).

2638326631 is a wasteful number, since it uses less digits than its factorization.

2638326631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398568.

The product of its digits is 186624, while the sum is 40.

The square root of 2638326631 is about 51364.6437834431. The cubic root of 2638326631 is about 1381.7925719595.

The spelling of 2638326631 in words is "two billion, six hundred thirty-eight million, three hundred twenty-six thousand, six hundred thirty-one".