164500505 has 8 divisors (see below), whose sum is σ = 212585352. Its totient is φ = 121477248.

The previous prime is 164500489. The next prime is 164500507. The reversal of 164500505 is 505005461.

It can be written as a sum of positive squares in 4 ways, for example, as 17799961 + 146700544 = 4219^2 + 12112^2 .

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 164500505 - 2⁴ = 164500489 is a prime.

It is a super-2 number, since 2×164500505² = 54120832290510050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164500507) 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, 1265324 + ... + 1265453.

It is an arithmetic number, because the mean of its divisors is an integer number (26573169).

Almost surely, 2^164500505 is an apocalyptic number.

It is an amenable number.

164500505 is a deficient number, since it is larger than the sum of its proper divisors (48084847).

164500505 is a wasteful number, since it uses less digits than its factorization.

164500505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530795.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 164500505 is about 12825.7750253152. The cubic root of 164500505 is about 547.9266345121.

Adding to 164500505 its reverse (505005461), we get a palindrome (669505966).

The spelling of 164500505 in words is "one hundred sixty-four million, five hundred thousand, five hundred five".