164501235220161 has 16 divisors (see below), whose sum is σ = 251323035992064. Its totient is φ = 93755273183184.

The previous prime is 164501235220121. The next prime is 164501235220171. The reversal of 164501235220161 is 161022532105461.

It is not a de Polignac number, because 164501235220161 - 2⁹ = 164501235219649 is a prime.

It is a super-2 number, since 2×164501235220161² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164501235220121) 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, 10226352471 + ... + 10226368556.

It is an arithmetic number, because the mean of its divisors is an integer number (15707689749504).

Almost surely, 2^{164501235220161} is an apocalyptic number.

It is an amenable number.

164501235220161 is a deficient number, since it is larger than the sum of its proper divisors (86821800771903).

164501235220161 is a wasteful number, since it uses less digits than its factorization.

164501235220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20452721420.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 164501235220161 in words is "one hundred sixty-four trillion, five hundred one billion, two hundred thirty-five million, two hundred twenty thousand, one hundred sixty-one".