164412565 has 8 divisors (see below), whose sum is σ = 197626968. Its totient is φ = 131308800.

The previous prime is 164412553. The next prime is 164412587. The reversal of 164412565 is 565214461.

It can be written as a sum of positive squares in 4 ways, for example, as 28153636 + 136258929 = 5306^2 + 11673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-164412565 is a prime.

It is a super-3 number, since 3×164412565³ (a number of 26 digits) contains 333 as substring.

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 164412565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24352 + ... + 30361.

It is an arithmetic number, because the mean of its divisors is an integer number (24703371).

Almost surely, 2^164412565 is an apocalyptic number.

It is an amenable number.

164412565 is a deficient number, since it is larger than the sum of its proper divisors (33214403).

164412565 is an equidigital number, since it uses as much as digits as its factorization.

164412565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55319.

The product of its digits is 28800, while the sum is 34.

The square root of 164412565 is about 12822.3463141502. The cubic root of 164412565 is about 547.8289787691.

The spelling of 164412565 in words is "one hundred sixty-four million, four hundred twelve thousand, five hundred sixty-five".