164535142621 has 8 divisors (see below), whose sum is σ = 164846558520. Its totient is φ = 164224017408.

The previous prime is 164535142561. The next prime is 164535142633. The reversal of 164535142621 is 126241535461.

164535142621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3577714596 + 160957428025 = 59814^2 + 401195^2 .

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 164535142621 - 2¹³ = 164535134429 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 (164535142721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077585 + ... + 1220761.

It is an arithmetic number, because the mean of its divisors is an integer number (20605819815).

Almost surely, 2^164535142621 is an apocalyptic number.

It is an amenable number.

164535142621 is a deficient number, since it is larger than the sum of its proper divisors (311415899).

164535142621 is a wasteful number, since it uses less digits than its factorization.

164535142621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145343.

The product of its digits is 172800, while the sum is 40.

The spelling of 164535142621 in words is "one hundred sixty-four billion, five hundred thirty-five million, one hundred forty-two thousand, six hundred twenty-one".