164410561 has 4 divisors (see below), whose sum is σ = 187897792. Its totient is φ = 140923332.

The previous prime is 164410489. The next prime is 164410583. The reversal of 164410561 is 165014461.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164410561 is a prime.

It is a super-3 number, since 3×164410561³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164416561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11743605 + ... + 11743618.

It is an arithmetic number, because the mean of its divisors is an integer number (46974448).

Almost surely, 2^164410561 is an apocalyptic number.

It is an amenable number.

164410561 is a deficient number, since it is larger than the sum of its proper divisors (23487231).

164410561 is an equidigital number, since it uses as much as digits as its factorization.

164410561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23487230.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 164410561 is about 12822.2681690877. The cubic root of 164410561 is about 547.8267529584.

The spelling of 164410561 in words is "one hundred sixty-four million, four hundred ten thousand, five hundred sixty-one".