164128723836 has 48 divisors (see below), whose sum is σ = 477465381120. Its totient is φ = 42630837120.

The previous prime is 164128723819. The next prime is 164128723867. The reversal of 164128723836 is 638327821461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88813321 + ... + 88815168.

It is an arithmetic number, because the mean of its divisors is an integer number (9947195440).

Almost surely, 2^164128723836 is an apocalyptic number.

It is an amenable number.

164128723836 is an abundant number, since it is smaller than the sum of its proper divisors (313336657284).

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

164128723836 is a wasteful number, since it uses less digits than its factorization.

164128723836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177628514 (or 177628512 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The spelling of 164128723836 in words is "one hundred sixty-four billion, one hundred twenty-eight million, seven hundred twenty-three thousand, eight hundred thirty-six".