2638788723 has 24 divisors (see below), whose sum is σ = 4029043200. Its totient is φ = 1659604464.

The previous prime is 2638788673. The next prime is 2638788749. The reversal of 2638788723 is 3278878362.

2638788723 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2638788723 - 2¹⁰ = 2638787699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2638788723.

It is not an unprimeable number, because it can be changed into a prime (2638788023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8586 + ... + 73152.

It is an arithmetic number, because the mean of its divisors is an integer number (167876800).

Almost surely, 2^2638788723 is an apocalyptic number.

2638788723 is a deficient number, since it is larger than the sum of its proper divisors (1390254477).

2638788723 is a wasteful number, since it uses less digits than its factorization.

2638788723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64831 (or 64828 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 2638788723 is about 51369.1417389857. The cubic root of 2638788723 is about 1381.8732390019.

The spelling of 2638788723 in words is "two billion, six hundred thirty-eight million, seven hundred eighty-eight thousand, seven hundred twenty-three".