164133641 has 4 divisors (see below), whose sum is σ = 187581312. Its totient is φ = 140685972.

The previous prime is 164133637. The next prime is 164133643. The reversal of 164133641 is 146331461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146331461 = 17 ⋅8607733.

It is not a de Polignac number, because 164133641 - 2² = 164133637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164133643) 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 3 ways as a sum of consecutive naturals, for example, 11723825 + ... + 11723838.

It is an arithmetic number, because the mean of its divisors is an integer number (46895328).

Almost surely, 2^164133641 is an apocalyptic number.

It is an amenable number.

164133641 is a deficient number, since it is larger than the sum of its proper divisors (23447671).

164133641 is an equidigital number, since it uses as much as digits as its factorization.

164133641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23447670.

The product of its digits is 5184, while the sum is 29.

The square root of 164133641 is about 12811.4652167502. The cubic root of 164133641 is about 547.5190082570.

The spelling of 164133641 in words is "one hundred sixty-four million, one hundred thirty-three thousand, six hundred forty-one".