164166820241 has 4 divisors (see below), whose sum is σ = 164249442672. Its totient is φ = 164084197812.

The previous prime is 164166820231. The next prime is 164166820351. The reversal of 164166820241 is 142028661461.

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.

It is a cyclic number.

It is not a de Polignac number, because 164166820241 - 2²² = 164162625937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164166820211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41308235 + ... + 41312208.

It is an arithmetic number, because the mean of its divisors is an integer number (41062360668).

Almost surely, 2^164166820241 is an apocalyptic number.

It is an amenable number.

164166820241 is a deficient number, since it is larger than the sum of its proper divisors (82622431).

164166820241 is an equidigital number, since it uses as much as digits as its factorization.

164166820241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82622430.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 164166820241 in words is "one hundred sixty-four billion, one hundred sixty-six million, eight hundred twenty thousand, two hundred forty-one".