6533378899 has 2 divisors, whose sum is σ = 6533378900. Its totient is φ = 6533378898.

The previous prime is 6533378879. The next prime is 6533378939. The reversal of 6533378899 is 9988733356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6533378899 - 2⁷ = 6533378771 is a prime.

It is not a weakly prime, because it can be changed into another prime (6533378879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3266689449 + 3266689450.

It is an arithmetic number, because the mean of its divisors is an integer number (3266689450).

Almost surely, 2^6533378899 is an apocalyptic number.

6533378899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6533378899 is an equidigital number, since it uses as much as digits as its factorization.

6533378899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 61.

The square root of 6533378899 is about 80829.3195505195. The cubic root of 6533378899 is about 1869.4446670935. Note that the first 3 decimals are identical.

The spelling of 6533378899 in words is "six billion, five hundred thirty-three million, three hundred seventy-eight thousand, eight hundred ninety-nine".