164723518138 has 8 divisors (see below), whose sum is σ = 261619705332. Its totient is φ = 77516949696.

The previous prime is 164723518111. The next prime is 164723518181. The reversal of 164723518138 is 831815327461.

164723518138 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 150608414889 + 14115103249 = 388083^2 + 118807^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 164723518091 and 164723518100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2422404645 + ... + 2422404712.

Almost surely, 2^164723518138 is an apocalyptic number.

164723518138 is a deficient number, since it is larger than the sum of its proper divisors (96896187194).

164723518138 is a wasteful number, since it uses less digits than its factorization.

164723518138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844809376.

The product of its digits is 967680, while the sum is 49.

The spelling of 164723518138 in words is "one hundred sixty-four billion, seven hundred twenty-three million, five hundred eighteen thousand, one hundred thirty-eight".