220788546809 has 8 divisors (see below), whose sum is σ = 234746138088. Its totient is φ = 206938736640.

The previous prime is 220788546791. The next prime is 220788546817. The reversal of 220788546809 is 908645887022.

It can be written as a sum of positive squares in 4 ways, for example, as 168897984784 + 51890562025 = 410972^2 + 227795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220788546809 - 2²⁸ = 220520111353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220788546829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26941052 + ... + 26949245.

It is an arithmetic number, because the mean of its divisors is an integer number (29343267261).

Almost surely, 2^220788546809 is an apocalyptic number.

It is an amenable number.

220788546809 is a deficient number, since it is larger than the sum of its proper divisors (13957591279).

220788546809 is a wasteful number, since it uses less digits than its factorization.

220788546809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53890555.

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 220788546809 in words is "two hundred twenty billion, seven hundred eighty-eight million, five hundred forty-six thousand, eight hundred nine".