5638215638 has 8 divisors (see below), whose sum is σ = 9226171080. Its totient is φ = 2562825280.

The previous prime is 5638215623. The next prime is 5638215677. The reversal of 5638215638 is 8365128365.

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

It is a junction number, because it is equal to n+sod(n) for n = 5638215592 and 5638215601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128141243 + ... + 128141286.

It is an arithmetic number, because the mean of its divisors is an integer number (1153271385).

Almost surely, 2^5638215638 is an apocalyptic number.

5638215638 is a deficient number, since it is larger than the sum of its proper divisors (3587955442).

5638215638 is a wasteful number, since it uses less digits than its factorization.

5638215638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256282542.

The product of its digits is 1036800, while the sum is 47.

The square root of 5638215638 is about 75088.0525649720. The cubic root of 5638215638 is about 1779.8383514780.

The spelling of 5638215638 in words is "five billion, six hundred thirty-eight million, two hundred fifteen thousand, six hundred thirty-eight".