164330561 has 8 divisors (see below), whose sum is σ = 171604224. Its totient is φ = 157067680.

The previous prime is 164330557. The next prime is 164330567. The reversal of 164330561 is 165033461.

It is a happy number.

164330561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 164330561 - 2² = 164330557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164330567) 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, 54680 + ... + 57606.

It is an arithmetic number, because the mean of its divisors is an integer number (21450528).

Almost surely, 2^164330561 is an apocalyptic number.

It is an amenable number.

164330561 is a deficient number, since it is larger than the sum of its proper divisors (7273663).

164330561 is a wasteful number, since it uses less digits than its factorization.

164330561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 164330561 is about 12819.1482166328. The cubic root of 164330561 is about 547.7378834635.

It can be divided in two parts, 16 and 4330561, that multiplied together give a square (69288976 = 8324²).

The spelling of 164330561 in words is "one hundred sixty-four million, three hundred thirty thousand, five hundred sixty-one".