164715321668 has 48 divisors (see below), whose sum is σ = 299950801920. Its totient is φ = 79086352800.

The previous prime is 164715321649. The next prime is 164715321731. The reversal of 164715321668 is 866123517461.

It is a super-2 number, since 2×164715321668² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 4365323 + ... + 4402893.

It is an arithmetic number, because the mean of its divisors is an integer number (6248975040).

Almost surely, 2^164715321668 is an apocalyptic number.

It is an amenable number.

164715321668 is a deficient number, since it is larger than the sum of its proper divisors (135235480252).

164715321668 is a wasteful number, since it uses less digits than its factorization.

164715321668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38048 (or 38046 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The spelling of 164715321668 in words is "one hundred sixty-four billion, seven hundred fifteen million, three hundred twenty-one thousand, six hundred sixty-eight".