2167421568 has 64 divisors (see below), whose sum is σ = 6200090400. Its totient is φ = 666897408.

The previous prime is 2167421563. The next prime is 2167421569. The reversal of 2167421568 is 8651247612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (2167421563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212098 + ... + 222081.

Almost surely, 2^2167421568 is an apocalyptic number.

It is an amenable number.

2167421568 is an abundant number, since it is smaller than the sum of its proper divisors (4032668832).

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

2167421568 is a wasteful number, since it uses less digits than its factorization.

2167421568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434209 (or 434197 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 2167421568 is about 46555.5750474634. The cubic root of 2167421568 is about 1294.1396108565.

The spelling of 2167421568 in words is "two billion, one hundred sixty-seven million, four hundred twenty-one thousand, five hundred sixty-eight".