2164044061 has 4 divisors (see below), whose sum is σ = 2238666300. Its totient is φ = 2089421824.

The previous prime is 2164044023. The next prime is 2164044089. The reversal of 2164044061 is 1604404612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1470722500 + 693321561 = 38350^2 + 26331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164044061 - 2⁷ = 2164043933 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 (2164044011) 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, 37311076 + ... + 37311133.

It is an arithmetic number, because the mean of its divisors is an integer number (559666575).

Almost surely, 2^2164044061 is an apocalyptic number.

It is an amenable number.

2164044061 is a deficient number, since it is larger than the sum of its proper divisors (74622239).

2164044061 is an equidigital number, since it uses as much as digits as its factorization.

2164044061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74622238.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2164044061 is about 46519.2869786286. The cubic root of 2164044061 is about 1293.4670393455.

Adding to 2164044061 its reverse (1604404612), we get a palindrome (3768448673).

The spelling of 2164044061 in words is "two billion, one hundred sixty-four million, forty-four thousand, sixty-one".