164216541986 has 32 divisors (see below), whose sum is σ = 305889669120. Its totient is φ = 64523595600.

The previous prime is 164216541943. The next prime is 164216541989. The reversal of 164216541986 is 689145612461.

It is not an unprimeable number, because it can be changed into a prime (164216541989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9949100 + ... + 9965591.

It is an arithmetic number, because the mean of its divisors is an integer number (9559052160).

Almost surely, 2^164216541986 is an apocalyptic number.

164216541986 is a deficient number, since it is larger than the sum of its proper divisors (141673127134).

164216541986 is a wasteful number, since it uses less digits than its factorization.

164216541986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19914750.

The product of its digits is 2488320, while the sum is 53.

The spelling of 164216541986 in words is "one hundred sixty-four billion, two hundred sixteen million, five hundred forty-one thousand, nine hundred eighty-six".