2638748873 has 2 divisors, whose sum is σ = 2638748874. Its totient is φ = 2638748872.

The previous prime is 2638748843. The next prime is 2638748887. The reversal of 2638748873 is 3788478362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1807695289 + 831053584 = 42517^2 + 28828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638748873 - 2¹⁰ = 2638747849 is a prime.

It is a super-2 number, since 2×2638748873² = 13925991229517540258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2638748803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319374436 + 1319374437.

It is an arithmetic number, because the mean of its divisors is an integer number (1319374437).

Almost surely, 2^2638748873 is an apocalyptic number.

It is an amenable number.

2638748873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638748873 is an equidigital number, since it uses as much as digits as its factorization.

2638748873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 56.

The square root of 2638748873 is about 51368.7538587418. The cubic root of 2638748873 is about 1381.8662827894.

The spelling of 2638748873 in words is "two billion, six hundred thirty-eight million, seven hundred forty-eight thousand, eight hundred seventy-three".