189806464866 has 8 divisors (see below), whose sum is σ = 379612929744. Its totient is φ = 63268821620.

The previous prime is 189806464853. The next prime is 189806464891. The reversal of 189806464866 is 668464608981.

It is a sphenic number, since it is the product of 3 distinct primes.

189806464866 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 189806464797 and 189806464806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15817205400 + ... + 15817205411.

It is an arithmetic number, because the mean of its divisors is an integer number (47451616218).

Almost surely, 2^189806464866 is an apocalyptic number.

189806464866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

189806464866 is a wasteful number, since it uses less digits than its factorization.

189806464866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31634410816.

The product of its (nonzero) digits is 95551488, while the sum is 66.

It can be divided in two parts, 18980 and 6464866, that added together give a palindrome (6483846).

The spelling of 189806464866 in words is "one hundred eighty-nine billion, eight hundred six million, four hundred sixty-four thousand, eight hundred sixty-six".