164412505 has 4 divisors (see below), whose sum is σ = 197295012. Its totient is φ = 131530000.

The previous prime is 164412463. The next prime is 164412541. The reversal of 164412505 is 505214461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80946009 + 83466496 = 8997^2 + 9136^2 .

It is not a de Polignac number, because 164412505 - 2¹³ = 164404313 is a prime.

It is a super-3 number, since 3×164412505³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16441246 + ... + 16441255.

It is an arithmetic number, because the mean of its divisors is an integer number (49323753).

Almost surely, 2^164412505 is an apocalyptic number.

It is an amenable number.

164412505 is a deficient number, since it is larger than the sum of its proper divisors (32882507).

164412505 is an equidigital number, since it uses as much as digits as its factorization.

164412505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32882506.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 164412505 is about 12822.3439744845. The cubic root of 164412505 is about 547.8289121284.

Adding to 164412505 its reverse (505214461), we get a palindrome (669626966).

The spelling of 164412505 in words is "one hundred sixty-four million, four hundred twelve thousand, five hundred five".