220755708409 has 4 divisors (see below), whose sum is σ = 220785036660. Its totient is φ = 220726380160.

The previous prime is 220755708301. The next prime is 220755708413. The reversal of 220755708409 is 904807557022.

220755708409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904807557022 = 2 ⋅452403778511.

It can be written as a sum of positive squares in 2 ways, for example, as 64688835600 + 156066872809 = 254340^2 + 395053^2 .

It is a cyclic number.

It is not a de Polignac number, because 220755708409 - 2⁹ = 220755707897 is a prime.

It is a super-2 number, since 2×220755708409² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220755708469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14652832 + ... + 14667889.

It is an arithmetic number, because the mean of its divisors is an integer number (55196259165).

Almost surely, 2^220755708409 is an apocalyptic number.

It is an amenable number.

220755708409 is a deficient number, since it is larger than the sum of its proper divisors (29328251).

220755708409 is an equidigital number, since it uses as much as digits as its factorization.

220755708409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29328250.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 220755708409 in words is "two hundred twenty billion, seven hundred fifty-five million, seven hundred eight thousand, four hundred nine".