164644664340 has 96 divisors (see below), whose sum is σ = 497228812416. Its totient is φ = 40465728000.

The previous prime is 164644664339. The next prime is 164644664347. The reversal of 164644664340 is 43466446461.

It is a super-3 number, since 3×164644664340³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164644664340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164644664347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347715 + ... + 670965.

It is an arithmetic number, because the mean of its divisors is an integer number (5179466796).

Almost surely, 2^164644664340 is an apocalyptic number.

164644664340 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 164644664340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248614406208).

164644664340 is an abundant number, since it is smaller than the sum of its proper divisors (332584148076).

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

164644664340 is a wasteful number, since it uses less digits than its factorization.

164644664340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323929 (or 323927 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 164644664340 in words is "one hundred sixty-four billion, six hundred forty-four million, six hundred sixty-four thousand, three hundred forty".