164181856 has 12 divisors (see below), whose sum is σ = 323233092. Its totient is φ = 82090912.

The previous prime is 164181851. The next prime is 164181883. The reversal of 164181856 is 658181461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164181851) 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 as a sum of consecutive naturals, namely, 2565310 + ... + 2565373.

It is an arithmetic number, because the mean of its divisors is an integer number (26936091).

Almost surely, 2^164181856 is an apocalyptic number.

164181856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164181856 is a deficient number, since it is larger than the sum of its proper divisors (159051236).

164181856 is an equidigital number, since it uses as much as digits as its factorization.

164181856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130693 (or 5130685 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 164181856 is about 12813.3467915295. The cubic root of 164181856 is about 547.5726150706.

The spelling of 164181856 in words is "one hundred sixty-four million, one hundred eighty-one thousand, eight hundred fifty-six".