164905989766 has 16 divisors (see below), whose sum is σ = 294987112704. Its totient is φ = 67601213064.

The previous prime is 164905989749. The next prime is 164905989823. The reversal of 164905989766 is 667989509461.

It is a junction number, because it is equal to n+sod(n) for n = 164905989695 and 164905989704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256064880 + ... + 256065523.

It is an arithmetic number, because the mean of its divisors is an integer number (18436694544).

Almost surely, 2^164905989766 is an apocalyptic number.

164905989766 is a deficient number, since it is larger than the sum of its proper divisors (130081122938).

164905989766 is a wasteful number, since it uses less digits than its factorization.

164905989766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512130435.

The product of its (nonzero) digits is 176359680, while the sum is 70.

The spelling of 164905989766 in words is "one hundred sixty-four billion, nine hundred five million, nine hundred eighty-nine thousand, seven hundred sixty-six".