2638488653 has 4 divisors (see below), whose sum is σ = 2639200320. Its totient is φ = 2637776988.

The previous prime is 2638488649. The next prime is 2638488667. The reversal of 2638488653 is 3568848362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2638488653 - 2² = 2638488649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2638488595 and 2638488604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638488613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350243 + ... + 357696.

It is an arithmetic number, because the mean of its divisors is an integer number (659800080).

Almost surely, 2^2638488653 is an apocalyptic number.

It is an amenable number.

2638488653 is a deficient number, since it is larger than the sum of its proper divisors (711667).

2638488653 is an equidigital number, since it uses as much as digits as its factorization.

2638488653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711666.

The product of its digits is 6635520, while the sum is 53.

The square root of 2638488653 is about 51366.2209336058. The cubic root of 2638488653 is about 1381.8208570867.

The spelling of 2638488653 in words is "two billion, six hundred thirty-eight million, four hundred eighty-eight thousand, six hundred fifty-three".