6393894951 has 4 divisors (see below), whose sum is σ = 8525193272. Its totient is φ = 4262596632.

The previous prime is 6393894929. The next prime is 6393894967. The reversal of 6393894951 is 1594983936.

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

It is not a de Polignac number, because 6393894951 - 2⁷ = 6393894823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6393894891 and 6393894900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6393894851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065649156 + ... + 1065649161.

It is an arithmetic number, because the mean of its divisors is an integer number (2131298318).

Almost surely, 2^6393894951 is an apocalyptic number.

6393894951 is a deficient number, since it is larger than the sum of its proper divisors (2131298321).

6393894951 is a wasteful number, since it uses less digits than its factorization.

6393894951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131298320.

The product of its digits is 6298560, while the sum is 57.

The square root of 6393894951 is about 79961.8343398899. The cubic root of 6393894951 is about 1856.0449888110.

The spelling of 6393894951 in words is "six billion, three hundred ninety-three million, eight hundred ninety-four thousand, nine hundred fifty-one".