6445740430 has 8 divisors (see below), whose sum is σ = 11602332792. Its totient is φ = 2578296168.

The previous prime is 6445740403. The next prime is 6445740439. The reversal of 6445740430 is 340475446.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6445740430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445740439) 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, 322287012 + ... + 322287031.

It is an arithmetic number, because the mean of its divisors is an integer number (1450291599).

Almost surely, 2^6445740430 is an apocalyptic number.

6445740430 is a deficient number, since it is larger than the sum of its proper divisors (5156592362).

6445740430 is a wasteful number, since it uses less digits than its factorization.

6445740430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644574050.

The product of its (nonzero) digits is 161280, while the sum is 37.

The square root of 6445740430 is about 80285.3687168465. The cubic root of 6445740430 is about 1861.0481268382.

The spelling of 6445740430 in words is "six billion, four hundred forty-five million, seven hundred forty thousand, four hundred thirty".