164842082795521 has 32 divisors (see below), whose sum is σ = 172939582771200. Its totient is φ = 156925103163840.

The previous prime is 164842082795491. The next prime is 164842082795581. The reversal of 164842082795521 is 125597280248461.

It is a cyclic number.

It is not a de Polignac number, because 164842082795521 - 2³⁹ = 164292326981633 is a prime.

It is a super-2 number, since 2×164842082795521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164842082795581) 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 31 ways as a sum of consecutive naturals, for example, 5019076926 + ... + 5019109768.

It is an arithmetic number, because the mean of its divisors is an integer number (5404361961600).

Almost surely, 2^{164842082795521} is an apocalyptic number.

It is an amenable number.

164842082795521 is a deficient number, since it is larger than the sum of its proper divisors (8097499975679).

164842082795521 is a wasteful number, since it uses less digits than its factorization.

164842082795521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36229.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 164842082795521 in words is "one hundred sixty-four trillion, eight hundred forty-two billion, eighty-two million, seven hundred ninety-five thousand, five hundred twenty-one".