6446742213 has 8 divisors (see below), whose sum is σ = 8596117728. Its totient is φ = 4297597424.

The previous prime is 6446742187. The next prime is 6446742229. The reversal of 6446742213 is 3122476446.

6446742213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6446742213 - 2¹² = 6446738117 is a prime.

It is a super-2 number, since 2×6446742213² = 83120970321752274738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446742233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24070 + ... + 116072.

It is an arithmetic number, because the mean of its divisors is an integer number (1074514716).

Almost surely, 2^6446742213 is an apocalyptic number.

It is an amenable number.

6446742213 is a deficient number, since it is larger than the sum of its proper divisors (2149375515).

6446742213 is a wasteful number, since it uses less digits than its factorization.

6446742213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115363.

The product of its digits is 193536, while the sum is 39.

The square root of 6446742213 is about 80291.6073634100. The cubic root of 6446742213 is about 1861.1445351986.

The spelling of 6446742213 in words is "six billion, four hundred forty-six million, seven hundred forty-two thousand, two hundred thirteen".