6163978393 has 4 divisors (see below), whose sum is σ = 6227524660. Its totient is φ = 6100432128.

The previous prime is 6163978361. The next prime is 6163978421. The reversal of 6163978393 is 3938793616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 981130329 + 5182848064 = 31323^2 + 71992^2 .

It is a cyclic number.

It is not a de Polignac number, because 6163978393 - 2⁵ = 6163978361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6163978343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31772988 + ... + 31773181.

It is an arithmetic number, because the mean of its divisors is an integer number (1556881165).

Almost surely, 2^6163978393 is an apocalyptic number.

It is an amenable number.

6163978393 is a deficient number, since it is larger than the sum of its proper divisors (63546267).

6163978393 is an equidigital number, since it uses as much as digits as its factorization.

6163978393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63546266.

The product of its digits is 4408992, while the sum is 55.

The square root of 6163978393 is about 78511.0081007753. The cubic root of 6163978393 is about 1833.5258442877.

The spelling of 6163978393 in words is "six billion, one hundred sixty-three million, nine hundred seventy-eight thousand, three hundred ninety-three".