2164461623 has 4 divisors (see below), whose sum is σ = 2164574808. Its totient is φ = 2164348440.

The previous prime is 2164461587. The next prime is 2164461643. The reversal of 2164461623 is 3261644612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2164461623 - 2⁸ = 2164461367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164461643) 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, 20036 + ... + 68777.

It is an arithmetic number, because the mean of its divisors is an integer number (541143702).

Almost surely, 2^2164461623 is an apocalyptic number.

2164461623 is a deficient number, since it is larger than the sum of its proper divisors (113185).

2164461623 is an equidigital number, since it uses as much as digits as its factorization.

2164461623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113184.

The product of its digits is 41472, while the sum is 35.

The square root of 2164461623 is about 46523.7748146042. The cubic root of 2164461623 is about 1293.5502274159.

The spelling of 2164461623 in words is "two billion, one hundred sixty-four million, four hundred sixty-one thousand, six hundred twenty-three".