164404664021001 has 4 divisors (see below), whose sum is σ = 219206218694672. Its totient is φ = 109603109347332.

The previous prime is 164404664020963. The next prime is 164404664021009. The reversal of 164404664021001 is 100120466404461.

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 not a de Polignac number, because 164404664021001 - 2⁶ = 164404664020937 is a prime.

It is a super-3 number, since 3×164404664021001³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164404664021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27400777336831 + ... + 27400777336836.

It is an arithmetic number, because the mean of its divisors is an integer number (54801554673668).

Almost surely, 2^{164404664021001} is an apocalyptic number.

It is an amenable number.

164404664021001 is a deficient number, since it is larger than the sum of its proper divisors (54801554673671).

164404664021001 is an equidigital number, since it uses as much as digits as its factorization.

164404664021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54801554673670.

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 164404664021001 in words is "one hundred sixty-four trillion, four hundred four billion, six hundred sixty-four million, twenty-one thousand, one".