164213220541 has 8 divisors (see below), whose sum is σ = 168226842168. Its totient is φ = 160200000000.

The previous prime is 164213220517. The next prime is 164213220551. The reversal of 164213220541 is 145022312461.

It can be written as a sum of positive squares in 4 ways, for example, as 69490232100 + 94722988441 = 263610^2 + 307771^2 .

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 164213220541 - 2¹¹ = 164213218493 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 (164213220551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833541 + ... + 1011541.

It is an arithmetic number, because the mean of its divisors is an integer number (21028355271).

Almost surely, 2^164213220541 is an apocalyptic number.

It is an amenable number.

164213220541 is a deficient number, since it is larger than the sum of its proper divisors (4013621627).

164213220541 is a wasteful number, since it uses less digits than its factorization.

164213220541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200543.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 164213220541 in words is "one hundred sixty-four billion, two hundred thirteen million, two hundred twenty thousand, five hundred forty-one".