164430681 has 8 divisors (see below), whose sum is σ = 232137504. Its totient is φ = 103172160.

The previous prime is 164430671. The next prime is 164430683. The reversal of 164430681 is 186034461.

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

It is not a de Polignac number, because 164430681 - 2²¹ = 162333529 is a prime.

It is a super-3 number, since 3×164430681³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (164430683) 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 7 ways as a sum of consecutive naturals, for example, 1612015 + ... + 1612116.

It is an arithmetic number, because the mean of its divisors is an integer number (29017188).

Almost surely, 2^164430681 is an apocalyptic number.

It is an amenable number.

164430681 is a deficient number, since it is larger than the sum of its proper divisors (67706823).

164430681 is a wasteful number, since it uses less digits than its factorization.

164430681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224151.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 164430681 is about 12823.0527176644. The cubic root of 164430681 is about 547.8490990993.

The spelling of 164430681 in words is "one hundred sixty-four million, four hundred thirty thousand, six hundred eighty-one".