164621968 has 30 divisors (see below), whose sum is σ = 371031126. Its totient is φ = 70551936.

The previous prime is 164621923. The next prime is 164621969. The reversal of 164621968 is 869126461.

It can be written as a sum of positive squares in only one way, i.e., 149035264 + 15586704 = 12208^2 + 3948^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (164621969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104205 + ... + 105772.

Almost surely, 2^164621968 is an apocalyptic number.

It is an amenable number.

164621968 is an abundant number, since it is smaller than the sum of its proper divisors (206409158).

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

164621968 is a wasteful number, since it uses less digits than its factorization.

164621968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209999 (or 209986 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 164621968 is about 12830.5092650292. The cubic root of 164621968 is about 548.0614597096.

The spelling of 164621968 in words is "one hundred sixty-four million, six hundred twenty-one thousand, nine hundred sixty-eight".