164315681 has 8 divisors (see below), whose sum is σ = 166682880. Its totient is φ = 161957872.

The previous prime is 164315677. The next prime is 164315699. The reversal of 164315681 is 186513461.

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

It is a cyclic number.

It is not a de Polignac number, because 164315681 - 2² = 164315677 is a prime.

It is a super-2 number, since 2×164315681² = 53999286044987522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164315621) 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, 37691 + ... + 41823.

It is an arithmetic number, because the mean of its divisors is an integer number (20835360).

Almost surely, 2^164315681 is an apocalyptic number.

It is an amenable number.

164315681 is a deficient number, since it is larger than the sum of its proper divisors (2367199).

164315681 is an equidigital number, since it uses as much as digits as its factorization.

164315681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695.

The product of its digits is 17280, while the sum is 35.

The square root of 164315681 is about 12818.5678217186. The cubic root of 164315681 is about 547.7213505563.

The spelling of 164315681 in words is "one hundred sixty-four million, three hundred fifteen thousand, six hundred eighty-one".