164581671 has 8 divisors (see below), whose sum is σ = 220655344. Its totient is φ = 109114560.

The previous prime is 164581663. The next prime is 164581691. The reversal of 164581671 is 176185461.

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

It is not a de Polignac number, because 164581671 - 2³ = 164581663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164581601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151006 + ... + 152091.

It is an arithmetic number, because the mean of its divisors is an integer number (27581918).

Almost surely, 2^164581671 is an apocalyptic number.

164581671 is a deficient number, since it is larger than the sum of its proper divisors (56073673).

164581671 is a wasteful number, since it uses less digits than its factorization.

164581671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303281.

The product of its digits is 40320, while the sum is 39.

The square root of 164581671 is about 12828.9388103615. The cubic root of 164581671 is about 548.0167369726.

The spelling of 164581671 in words is "one hundred sixty-four million, five hundred eighty-one thousand, six hundred seventy-one".