2180609953 has 4 divisors (see below), whose sum is σ = 2189969028. Its totient is φ = 2171250880.

The previous prime is 2180609927. The next prime is 2180609971. The reversal of 2180609953 is 3599060812.

It is a happy number.

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 442387089 + 1738222864 = 21033^2 + 41692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180609953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180609653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679188 + ... + 4679653.

It is an arithmetic number, because the mean of its divisors is an integer number (547492257).

Almost surely, 2^2180609953 is an apocalyptic number.

It is an amenable number.

2180609953 is a deficient number, since it is larger than the sum of its proper divisors (9359075).

2180609953 is an equidigital number, since it uses as much as digits as its factorization.

2180609953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9359074.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 2180609953 is about 46697.0015418549. The cubic root of 2180609953 is about 1296.7591766445.

The spelling of 2180609953 in words is "two billion, one hundred eighty million, six hundred nine thousand, nine hundred fifty-three".