220155357668 has 6 divisors (see below), whose sum is σ = 385271875926. Its totient is φ = 110077678832.

The previous prime is 220155357659. The next prime is 220155357689. The reversal of 220155357668 is 866753551022.

It can be written as a sum of positive squares in only one way, i.e., 215972113984 + 4183243684 = 464728^2 + 64678^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27519419705 + ... + 27519419712.

It is an arithmetic number, because the mean of its divisors is an integer number (64211979321).

Almost surely, 2^220155357668 is an apocalyptic number.

It is an amenable number.

220155357668 is a deficient number, since it is larger than the sum of its proper divisors (165116518258).

220155357668 is a wasteful number, since it uses less digits than its factorization.

220155357668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55038839421 (or 55038839419 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 220155357668 in words is "two hundred twenty billion, one hundred fifty-five million, three hundred fifty-seven thousand, six hundred sixty-eight".