6563794397 has 4 divisors (see below), whose sum is σ = 6909257280. Its totient is φ = 6218331516.

The previous prime is 6563794361. The next prime is 6563794399. The reversal of 6563794397 is 7934973656.

It is a happy number.

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 6563794397 - 2¹⁶ = 6563728861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563794399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172731413 + ... + 172731450.

It is an arithmetic number, because the mean of its divisors is an integer number (1727314320).

Almost surely, 2^6563794397 is an apocalyptic number.

It is an amenable number.

6563794397 is a deficient number, since it is larger than the sum of its proper divisors (345462883).

6563794397 is a wasteful number, since it uses less digits than its factorization.

6563794397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345462882.

The product of its digits is 25719120, while the sum is 59.

The square root of 6563794397 is about 81017.2475279184. The cubic root of 6563794397 is about 1872.3411817151.

The spelling of 6563794397 in words is "six billion, five hundred sixty-three million, seven hundred ninety-four thousand, three hundred ninety-seven".