164071188 has 18 divisors (see below), whose sum is σ = 414735594. Its totient is φ = 54690384.

The previous prime is 164071181. The next prime is 164071207. The reversal of 164071188 is 881170461.

164071188 is a `hidden beast` number, since 1 + 640 + 7 + 1 + 1 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159062544 + 5008644 = 12612^2 + 2238^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4557533 = 164071188 / (1 + 6 + 4 + 0 + 7 + 1 + 1 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164071181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2278731 + ... + 2278802.

Almost surely, 2^164071188 is an apocalyptic number.

164071188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164071188 is an abundant number, since it is smaller than the sum of its proper divisors (250664406).

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

164071188 is a wasteful number, since it uses less digits than its factorization.

164071188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557543 (or 4557538 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 164071188 is about 12809.0275977531. The cubic root of 164071188 is about 547.4495556201.

The spelling of 164071188 in words is "one hundred sixty-four million, seventy-one thousand, one hundred eighty-eight".