2164747904 has 64 divisors (see below), whose sum is σ = 4981435200. Its totient is φ = 926085120.

The previous prime is 2164747903. The next prime is 2164747943. The reversal of 2164747904 is 4097474612.

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

It is a super-2 number, since 2×2164747904² = 9372266975744786432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (2164747901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21284 + ... + 69155.

It is an arithmetic number, because the mean of its divisors is an integer number (77834925).

Almost surely, 2^2164747904 is an apocalyptic number.

It is an amenable number.

2164747904 is an abundant number, since it is smaller than the sum of its proper divisors (2816687296).

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

2164747904 is a wasteful number, since it uses less digits than its factorization.

2164747904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90481 (or 90469 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 2164747904 is about 46526.8514301151. The cubic root of 2164747904 is about 1293.6072550733.

The spelling of 2164747904 in words is "two billion, one hundred sixty-four million, seven hundred forty-seven thousand, nine hundred four".