6563138399 has 8 divisors (see below), whose sum is σ = 6665514912. Its totient is φ = 6461038080.

The previous prime is 6563138381. The next prime is 6563138401. The reversal of 6563138399 is 9938313656.

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

It is a cyclic number.

It is not a de Polignac number, because 6563138399 - 2¹⁶ = 6563072863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6563138399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563138599) 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, 20894 + ... + 116459.

It is an arithmetic number, because the mean of its divisors is an integer number (833189364).

Almost surely, 2^6563138399 is an apocalyptic number.

6563138399 is a deficient number, since it is larger than the sum of its proper divisors (102376513).

6563138399 is a wasteful number, since it uses less digits than its factorization.

6563138399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138097.

The product of its digits is 3149280, while the sum is 53.

The square root of 6563138399 is about 81013.1989184479. The cubic root of 6563138399 is about 1872.2788045332.

The spelling of 6563138399 in words is "six billion, five hundred sixty-three million, one hundred thirty-eight thousand, three hundred ninety-nine".