2164866361 has 4 divisors (see below), whose sum is σ = 2474132992. Its totient is φ = 1855599732.

The previous prime is 2164866311. The next prime is 2164866373. The reversal of 2164866361 is 1636684612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2164866361 - 2¹³ = 2164858169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164866311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154633305 + ... + 154633318.

It is an arithmetic number, because the mean of its divisors is an integer number (618533248).

Almost surely, 2^2164866361 is an apocalyptic number.

It is an amenable number.

2164866361 is a deficient number, since it is larger than the sum of its proper divisors (309266631).

2164866361 is an equidigital number, since it uses as much as digits as its factorization.

2164866361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309266630.

The product of its digits is 248832, while the sum is 43.

The square root of 2164866361 is about 46528.1244087917. The cubic root of 2164866361 is about 1293.6308504366.

The spelling of 2164866361 in words is "two billion, one hundred sixty-four million, eight hundred sixty-six thousand, three hundred sixty-one".