164173290638 has 8 divisors (see below), whose sum is σ = 281439926832. Its totient is φ = 70359981696.

The previous prime is 164173290623. The next prime is 164173290643. The reversal of 164173290638 is 836092371461.

164173290638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5863331795 + ... + 5863331822.

It is an arithmetic number, because the mean of its divisors is an integer number (35179990854).

Almost surely, 2^164173290638 is an apocalyptic number.

164173290638 is a deficient number, since it is larger than the sum of its proper divisors (117266636194).

164173290638 is a wasteful number, since it uses less digits than its factorization.

164173290638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11726663626.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 164173290638 in words is "one hundred sixty-four billion, one hundred seventy-three million, two hundred ninety thousand, six hundred thirty-eight".