6444420168 has 16 divisors (see below), whose sum is σ = 16111050480. Its totient is φ = 2148140048.

The previous prime is 6444420119. The next prime is 6444420187. The reversal of 6444420168 is 8610244446.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134258730 + ... + 134258777.

It is an arithmetic number, because the mean of its divisors is an integer number (1006940655).

Almost surely, 2^6444420168 is an apocalyptic number.

It is an amenable number.

6444420168 is an abundant number, since it is smaller than the sum of its proper divisors (9666630312).

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

6444420168 is a wasteful number, since it uses less digits than its factorization.

6444420168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268517516 (or 268517512 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The square root of 6444420168 is about 80277.1459881329. The cubic root of 6444420168 is about 1860.9210538290.

The spelling of 6444420168 in words is "six billion, four hundred forty-four million, four hundred twenty thousand, one hundred sixty-eight".