164632191 has 8 divisors (see below), whose sum is σ = 220075440. Its totient is φ = 109471872.

The previous prime is 164632177. The next prime is 164632201. The reversal of 164632191 is 191236461.

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

It is not a de Polignac number, because 164632191 - 2¹⁹ = 164107903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164632141) 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, 69370 + ... + 71703.

It is an arithmetic number, because the mean of its divisors is an integer number (27509430).

Almost surely, 2^164632191 is an apocalyptic number.

164632191 is a deficient number, since it is larger than the sum of its proper divisors (55443249).

164632191 is a wasteful number, since it uses less digits than its factorization.

164632191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141465.

The product of its digits is 7776, while the sum is 33.

The square root of 164632191 is about 12830.9076452136. The cubic root of 164632191 is about 548.0728043201.

The spelling of 164632191 in words is "one hundred sixty-four million, six hundred thirty-two thousand, one hundred ninety-one".