5643694445 has 8 divisors (see below), whose sum is σ = 6774112536. Its totient is φ = 4513836096.

The previous prime is 5643694421. The next prime is 5643694489. The reversal of 5643694445 is 5444963465.

It can be written as a sum of positive squares in 4 ways, for example, as 61512649 + 5582181796 = 7843^2 + 74714^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5643694445 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5643694393 and 5643694402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 117422 + ... + 158351.

It is an arithmetic number, because the mean of its divisors is an integer number (846764067).

Almost surely, 2^5643694445 is an apocalyptic number.

It is an amenable number.

5643694445 is a deficient number, since it is larger than the sum of its proper divisors (1130418091).

5643694445 is a wasteful number, since it uses less digits than its factorization.

5643694445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279871.

The product of its digits is 6220800, while the sum is 50.

The square root of 5643694445 is about 75124.5262547459. The cubic root of 5643694445 is about 1780.4146705705.

The spelling of 5643694445 in words is "five billion, six hundred forty-three million, six hundred ninety-four thousand, four hundred forty-five".