2164718464 has 32 divisors (see below), whose sum is σ = 4317231600. Its totient is φ = 1081178112.

The previous prime is 2164718459. The next prime is 2164718467. The reversal of 2164718464 is 4648174612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2164718464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164718467) 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, 115032 + ... + 132520.

Almost surely, 2^2164718464 is an apocalyptic number.

It is an amenable number.

2164718464 is a deficient number, since it is larger than the sum of its proper divisors (2152513136).

2164718464 is an equidigital number, since it uses as much as digits as its factorization.

2164718464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18470 (or 18458 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 2164718464 is about 46526.5350525912. The cubic root of 2164718464 is about 1293.6013908076.

The spelling of 2164718464 in words is "two billion, one hundred sixty-four million, seven hundred eighteen thousand, four hundred sixty-four".