163628686866 has 64 divisors (see below), whose sum is σ = 334675123200. Its totient is φ = 53317915200.

The previous prime is 163628686861. The next prime is 163628686873. The reversal of 163628686866 is 668686826361.

163628686866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 163628686797 and 163628686806.

It is not an unprimeable number, because it can be changed into a prime (163628686861) 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, 51437796 + ... + 51440976.

It is an arithmetic number, because the mean of its divisors is an integer number (5229298800).

Almost surely, 2^163628686866 is an apocalyptic number.

163628686866 is an abundant number, since it is smaller than the sum of its proper divisors (171046436334).

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

163628686866 is a wasteful number, since it uses less digits than its factorization.

163628686866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015.

The product of its digits is 143327232, while the sum is 66.

The spelling of 163628686866 in words is "one hundred sixty-three billion, six hundred twenty-eight million, six hundred eighty-six thousand, eight hundred sixty-six".