6447740233 has 4 divisors (see below), whose sum is σ = 7033898448. Its totient is φ = 5861582020.

The previous prime is 6447740219. The next prime is 6447740239. The reversal of 6447740233 is 3320477446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6447740233 - 2⁹ = 6447739721 is a prime.

It is a super-2 number, since 2×6447740233² = 83146708224493788578, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6447740239) 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, 293079091 + ... + 293079112.

It is an arithmetic number, because the mean of its divisors is an integer number (1758474612).

Almost surely, 2^6447740233 is an apocalyptic number.

It is an amenable number.

6447740233 is a deficient number, since it is larger than the sum of its proper divisors (586158215).

6447740233 is a wasteful number, since it uses less digits than its factorization.

6447740233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586158214.

The product of its (nonzero) digits is 338688, while the sum is 40.

The square root of 6447740233 is about 80297.8220937530. The cubic root of 6447740233 is about 1861.2405714892.

The spelling of 6447740233 in words is "six billion, four hundred forty-seven million, seven hundred forty thousand, two hundred thirty-three".