220052255661 has 32 divisors (see below), whose sum is σ = 394491444480. Its totient is φ = 118347429888.

The previous prime is 220052255617. The next prime is 220052255723. The reversal of 220052255661 is 166552250022.

220052255661 is a `hidden beast` number, since 2 + 20 + 0 + 5 + 22 + 556 + 61 = 666.

It is not a de Polignac number, because 220052255661 - 2⁹ = 220052255149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220052255611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34240836 + ... + 34247261.

It is an arithmetic number, because the mean of its divisors is an integer number (12327857640).

Almost surely, 2^220052255661 is an apocalyptic number.

220052255661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220052255661 is a deficient number, since it is larger than the sum of its proper divisors (174439188819).

220052255661 is a wasteful number, since it uses less digits than its factorization.

220052255661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68488130 (or 68488124 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 220052255661 in words is "two hundred twenty billion, fifty-two million, two hundred fifty-five thousand, six hundred sixty-one".