164031647218 has 8 divisors (see below), whose sum is σ = 249417984348. Its totient is φ = 80892319104.

The previous prime is 164031647183. The next prime is 164031647237. The reversal of 164031647218 is 812746130461.

It can be written as a sum of positive squares in 2 ways, for example, as 160638235209 + 3393412009 = 400797^2 + 58253^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561752071 + ... + 561752362.

Almost surely, 2^164031647218 is an apocalyptic number.

164031647218 is a deficient number, since it is larger than the sum of its proper divisors (85386337130).

164031647218 is a wasteful number, since it uses less digits than its factorization.

164031647218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123504508.

The product of its (nonzero) digits is 193536, while the sum is 43.

Adding to 164031647218 its reverse (812746130461), we get a palindrome (976777777679).

The spelling of 164031647218 in words is "one hundred sixty-four billion, thirty-one million, six hundred forty-seven thousand, two hundred eighteen".