164566020255251 has 8 divisors (see below), whose sum is σ = 165670805660400. Its totient is φ = 163461239056672.

The previous prime is 164566020255209. The next prime is 164566020255311. The reversal of 164566020255251 is 152552020665461.

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 164566020255251 - 2¹⁰ = 164566020254227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164566020255251.

It is not an unprimeable number, because it can be changed into a prime (164566020255151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150715301 + ... + 151803273.

It is an arithmetic number, because the mean of its divisors is an integer number (20708850707550).

Almost surely, 2^{164566020255251} is an apocalyptic number.

164566020255251 is a deficient number, since it is larger than the sum of its proper divisors (1104785405149).

164566020255251 is a wasteful number, since it uses less digits than its factorization.

164566020255251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103285.

The product of its (nonzero) digits is 4320000, while the sum is 50.

The spelling of 164566020255251 in words is "one hundred sixty-four trillion, five hundred sixty-six billion, twenty million, two hundred fifty-five thousand, two hundred fifty-one".