164256406218 has 48 divisors (see below), whose sum is σ = 360310519296. Its totient is φ = 54072374400.

The previous prime is 164256406213. The next prime is 164256406241. The reversal of 164256406218 is 812604652461.

It is a happy number.

164256406218 is a `hidden beast` number, since 1 + 6 + 4 + 25 + 6 + 406 + 218 = 666.

It is not an unprimeable number, because it can be changed into a prime (164256406213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4309143 + ... + 4347093.

It is an arithmetic number, because the mean of its divisors is an integer number (7506469152).

Almost surely, 2^164256406218 is an apocalyptic number.

164256406218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164256406218 is an abundant number, since it is smaller than the sum of its proper divisors (196054113078).

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

164256406218 is a wasteful number, since it uses less digits than its factorization.

164256406218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40939 (or 40936 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 164256406218 in words is "one hundred sixty-four billion, two hundred fifty-six million, four hundred six thousand, two hundred eighteen".