164178206645 has 8 divisors (see below), whose sum is σ = 197146705056. Its totient is φ = 131253993936.

The previous prime is 164178206629. The next prime is 164178206653. The reversal of 164178206645 is 546602871461.

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

It is a cyclic number.

It is not a de Polignac number, because 164178206645 - 2⁴ = 164178206629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164178206593 and 164178206602.

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, 11063267 + ... + 11078096.

It is an arithmetic number, because the mean of its divisors is an integer number (24643338132).

Almost surely, 2^164178206645 is an apocalyptic number.

It is an amenable number.

164178206645 is a deficient number, since it is larger than the sum of its proper divisors (32968498411).

164178206645 is a wasteful number, since it uses less digits than its factorization.

164178206645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22142851.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 164178206645 in words is "one hundred sixty-four billion, one hundred seventy-eight million, two hundred six thousand, six hundred forty-five".