164415569921 has 16 divisors (see below), whose sum is σ = 174508992000. Its totient is φ = 154369494528.

The previous prime is 164415569849. The next prime is 164415569933. The reversal of 164415569921 is 129965514461.

It is a cyclic number.

It is not a de Polignac number, because 164415569921 - 2¹⁴ = 164415553537 is a prime.

It is a super-3 number, since 3×164415569921³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164415560921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12815516 + ... + 12828338.

It is an arithmetic number, because the mean of its divisors is an integer number (10906812000).

Almost surely, 2^164415569921 is an apocalyptic number.

It is an amenable number.

164415569921 is a deficient number, since it is larger than the sum of its proper divisors (10093422079).

164415569921 is a wasteful number, since it uses less digits than its factorization.

164415569921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608.

The product of its digits is 2332800, while the sum is 53.

The spelling of 164415569921 in words is "one hundred sixty-four billion, four hundred fifteen million, five hundred sixty-nine thousand, nine hundred twenty-one".