164791885 has 8 divisors (see below), whose sum is σ = 197824536. Its totient is φ = 131784000.

The previous prime is 164791841. The next prime is 164791889. The reversal of 164791885 is 588197461.

It can be written as a sum of positive squares in 4 ways, for example, as 465124 + 164326761 = 682^2 + 12819^2 .

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

It is not a de Polignac number, because 164791885 - 2⁹ = 164791373 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 (164791889) 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, 15135 + ... + 23635.

It is an arithmetic number, because the mean of its divisors is an integer number (24728067).

Almost surely, 2^164791885 is an apocalyptic number.

It is an amenable number.

164791885 is a deficient number, since it is larger than the sum of its proper divisors (33032651).

164791885 is an equidigital number, since it uses as much as digits as its factorization.

164791885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12383.

The product of its digits is 483840, while the sum is 49.

The square root of 164791885 is about 12837.1291572532. The cubic root of 164791885 is about 548.2499581189.

The spelling of 164791885 in words is "one hundred sixty-four million, seven hundred ninety-one thousand, eight hundred eighty-five".