6394027643 has 4 divisors (see below), whose sum is σ = 6514669728. Its totient is φ = 6273385560.

The previous prime is 6394027639. The next prime is 6394027657. The reversal of 6394027643 is 3467204936.

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

It is a cyclic number.

It is not a de Polignac number, because 6394027643 - 2² = 6394027639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6394027594 and 6394027603.

It is not an unprimeable number, because it can be changed into a prime (6394027603) 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, 60320963 + ... + 60321068.

It is an arithmetic number, because the mean of its divisors is an integer number (1628667432).

Almost surely, 2^6394027643 is an apocalyptic number.

6394027643 is a deficient number, since it is larger than the sum of its proper divisors (120642085).

6394027643 is a wasteful number, since it uses less digits than its factorization.

6394027643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120642084.

The product of its (nonzero) digits is 653184, while the sum is 44.

The square root of 6394027643 is about 79962.6640564207. The cubic root of 6394027643 is about 1856.0578281741.

The spelling of 6394027643 in words is "six billion, three hundred ninety-four million, twenty-seven thousand, six hundred forty-three".