220255457657 has 4 divisors (see below), whose sum is σ = 220540394340. Its totient is φ = 219970520976.

The previous prime is 220255457623. The next prime is 220255457677. The reversal of 220255457657 is 756754552022.

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 79237183081 + 141018274576 = 281491^2 + 375524^2 .

It is a cyclic number.

It is not a de Polignac number, because 220255457657 - 2¹⁰ = 220255456633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220255457677) 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, 142467182 + ... + 142468727.

It is an arithmetic number, because the mean of its divisors is an integer number (55135098585).

Almost surely, 2^220255457657 is an apocalyptic number.

It is an amenable number.

220255457657 is a deficient number, since it is larger than the sum of its proper divisors (284936683).

220255457657 is an equidigital number, since it uses as much as digits as its factorization.

220255457657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284936682.

The product of its (nonzero) digits is 5880000, while the sum is 50.

The spelling of 220255457657 in words is "two hundred twenty billion, two hundred fifty-five million, four hundred fifty-seven thousand, six hundred fifty-seven".