164331681 has 8 divisors (see below), whose sum is σ = 224204640. Its totient is φ = 107006592.

The previous prime is 164331679. The next prime is 164331683. The reversal of 164331681 is 186133461.

It is an interprime number because it is at equal distance from previous prime (164331679) and next prime (164331683).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164331681 - 2¹ = 164331679 is a prime.

It is a super-2 number, since 2×164331681² = 54009802760571522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164331683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636816 + ... + 637073.

It is an arithmetic number, because the mean of its divisors is an integer number (28025580).

Almost surely, 2^164331681 is an apocalyptic number.

It is an amenable number.

164331681 is a deficient number, since it is larger than the sum of its proper divisors (59872959).

164331681 is a wasteful number, since it uses less digits than its factorization.

164331681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273935.

The product of its digits is 10368, while the sum is 33.

The square root of 164331681 is about 12819.1919012081. The cubic root of 164331681 is about 547.7391278355.

The spelling of 164331681 in words is "one hundred sixty-four million, three hundred thirty-one thousand, six hundred eighty-one".