164552220541 has 4 divisors (see below), whose sum is σ = 164599686432. Its totient is φ = 164504754652.

The previous prime is 164552220523. The next prime is 164552220653. The reversal of 164552220541 is 145022255461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145022255461 = 24623 ⋅5889707.

It is a cyclic number.

It is not a de Polignac number, because 164552220541 - 2⁵ = 164552220509 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 164552220541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164559220541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23727745 + ... + 23734678.

It is an arithmetic number, because the mean of its divisors is an integer number (41149921608).

Almost surely, 2^164552220541 is an apocalyptic number.

It is an amenable number.

164552220541 is a deficient number, since it is larger than the sum of its proper divisors (47465891).

164552220541 is an equidigital number, since it uses as much as digits as its factorization.

164552220541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47465890.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 164552220541 in words is "one hundred sixty-four billion, five hundred fifty-two million, two hundred twenty thousand, five hundred forty-one".