6438219450 has 96 divisors (see below), whose sum is σ = 17285102016. Its totient is φ = 1576488960.

The previous prime is 6438219371. The next prime is 6438219457. The reversal of 6438219450 is 549128346.

It is not an unprimeable number, because it can be changed into a prime (6438219457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 367797 + ... + 384903.

It is an arithmetic number, because the mean of its divisors is an integer number (180053146).

Almost surely, 2^6438219450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6438219450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8642551008).

6438219450 is an abundant number, since it is smaller than the sum of its proper divisors (10846882566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6438219450 is a wasteful number, since it uses less digits than its factorization.

6438219450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17328 (or 17323 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 6438219450 is about 80238.5160007337. The cubic root of 6438219450 is about 1860.3240128101.

The spelling of 6438219450 in words is "six billion, four hundred thirty-eight million, two hundred nineteen thousand, four hundred fifty".