164664324220000 has 480 divisors, whose sum is σ = 475083510612480. Its totient is φ = 55519453440000.

The previous prime is 164664324219961. The next prime is 164664324220091. The reversal of 164664324220000 is 22423466461.

It is a super-2 number, since 2×164664324220000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 196040922 + ... + 196879078.

It is an arithmetic number, because the mean of its divisors is an integer number (989757313776).

Almost surely, 2^{164664324220000} is an apocalyptic number.

164664324220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164664324220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237541755306240).

164664324220000 is an abundant number, since it is smaller than the sum of its proper divisors (310419186392480).

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

164664324220000 is a wasteful number, since it uses less digits than its factorization.

164664324220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838264 (or 838241 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

Adding to 164664324220000 its reverse (22423466461), we get a palindrome (164686747686461).

The spelling of 164664324220000 in words is "one hundred sixty-four trillion, six hundred sixty-four billion, three hundred twenty-four million, two hundred twenty thousand".