5638639213 has 8 divisors (see below), whose sum is σ = 5650362432. Its totient is φ = 5626929696.

The previous prime is 5638639199. The next prime is 5638639219. The reversal of 5638639213 is 3129368365.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5638639213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638639219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237806 + ... + 1242352.

It is an arithmetic number, because the mean of its divisors is an integer number (706295304).

Almost surely, 2^5638639213 is an apocalyptic number.

It is an amenable number.

5638639213 is a deficient number, since it is larger than the sum of its proper divisors (11723219).

5638639213 is a wasteful number, since it uses less digits than its factorization.

5638639213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851.

The product of its digits is 699840, while the sum is 46.

The square root of 5638639213 is about 75090.8730339447. The cubic root of 5638639213 is about 1779.8829209068.

The spelling of 5638639213 in words is "five billion, six hundred thirty-eight million, six hundred thirty-nine thousand, two hundred thirteen".