220168351668 has 24 divisors (see below), whose sum is σ = 513768959872. Its totient is φ = 73383335424.

The previous prime is 220168351661. The next prime is 220168351693. The reversal of 220168351668 is 866153861022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220168351661) 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, 613180 + ... + 903507.

Almost surely, 2^220168351668 is an apocalyptic number.

It is an amenable number.

220168351668 is an abundant number, since it is smaller than the sum of its proper divisors (293600608204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220168351668 is a wasteful number, since it uses less digits than its factorization.

220168351668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528791 (or 1528789 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 220168351668 in words is "two hundred twenty billion, one hundred sixty-eight million, three hundred fifty-one thousand, six hundred sixty-eight".