164643020212 has 24 divisors (see below), whose sum is σ = 314330006592. Its totient is φ = 74834995200.

The previous prime is 164643020189. The next prime is 164643020249. The reversal of 164643020212 is 212020346461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606137 + ... + 1705567.

It is an arithmetic number, because the mean of its divisors is an integer number (13097083608).

Almost surely, 2^164643020212 is an apocalyptic number.

It is an amenable number.

164643020212 is a deficient number, since it is larger than the sum of its proper divisors (149686986380).

164643020212 is a wasteful number, since it uses less digits than its factorization.

164643020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137079 (or 137077 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 164643020212 its reverse (212020346461), we get a palindrome (376663366673).

The spelling of 164643020212 in words is "one hundred sixty-four billion, six hundred forty-three million, twenty thousand, two hundred twelve".