2168949664 has 24 divisors (see below), whose sum is σ = 4880137248. Its totient is φ = 929549760.

The previous prime is 2168949637. The next prime is 2168949667. The reversal of 2168949664 is 4669498612.

It is not an unprimeable number, because it can be changed into a prime (2168949667) 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, 4841182 + ... + 4841629.

It is an arithmetic number, because the mean of its divisors is an integer number (203339052).

Almost surely, 2^2168949664 is an apocalyptic number.

It is an amenable number.

2168949664 is an abundant number, since it is smaller than the sum of its proper divisors (2711187584).

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

2168949664 is an equidigital number, since it uses as much as digits as its factorization.

2168949664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9682828 (or 9682820 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 55.

The square root of 2168949664 is about 46571.9836811790. The cubic root of 2168949664 is about 1294.4436749152.

The spelling of 2168949664 in words is "two billion, one hundred sixty-eight million, nine hundred forty-nine thousand, six hundred sixty-four".