2638721323 has 8 divisors (see below), whose sum is σ = 3016557792. Its totient is φ = 2261103936.

The previous prime is 2638721297. The next prime is 2638721363. The reversal of 2638721323 is 3231278362.

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

It is not a de Polignac number, because 2638721323 - 2²¹ = 2636624171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638721363) 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 7 ways as a sum of consecutive naturals, for example, 28090 + ... + 77887.

It is an arithmetic number, because the mean of its divisors is an integer number (377069724).

Almost surely, 2^2638721323 is an apocalyptic number.

2638721323 is a deficient number, since it is larger than the sum of its proper divisors (377836469).

2638721323 is a wasteful number, since it uses less digits than its factorization.

2638721323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109541.

The product of its digits is 72576, while the sum is 37.

The square root of 2638721323 is about 51368.4856989186. The cubic root of 2638721323 is about 1381.8614736228.

Adding to 2638721323 its reverse (3231278362), we get a palindrome (5869999685).

The spelling of 2638721323 in words is "two billion, six hundred thirty-eight million, seven hundred twenty-one thousand, three hundred twenty-three".