164320411544221 has 8 divisors (see below), whose sum is σ = 164771544086784. Its totient is φ = 163869602514960.

The previous prime is 164320411544213. The next prime is 164320411544231. The reversal of 164320411544221 is 122445114023461.

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

It is a cyclic number.

It is not a de Polignac number, because 164320411544221 - 2³ = 164320411544213 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 (164320411544231) 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, 79861065 + ... + 81892798.

It is an arithmetic number, because the mean of its divisors is an integer number (20596443010848).

Almost surely, 2^{164320411544221} is an apocalyptic number.

It is an amenable number.

164320411544221 is a deficient number, since it is larger than the sum of its proper divisors (451132542563).

164320411544221 is a wasteful number, since it uses less digits than its factorization.

164320411544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161756651.

The product of its (nonzero) digits is 184320, while the sum is 40.

Adding to 164320411544221 its reverse (122445114023461), we get a palindrome (286765525567682).

The spelling of 164320411544221 in words is "one hundred sixty-four trillion, three hundred twenty billion, four hundred eleven million, five hundred forty-four thousand, two hundred twenty-one".