164381465 has 4 divisors (see below), whose sum is σ = 197257764. Its totient is φ = 131505168.

The previous prime is 164381453. The next prime is 164381507. The reversal of 164381465 is 564183461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564183461 = 9473 ⋅59557.

It can be written as a sum of positive squares in 2 ways, for example, as 94692361 + 69689104 = 9731^2 + 8348^2 .

It is a cyclic number.

It is not a de Polignac number, because 164381465 - 2¹⁰ = 164380441 is a prime.

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, 16438142 + ... + 16438151.

It is an arithmetic number, because the mean of its divisors is an integer number (49314441).

Almost surely, 2^164381465 is an apocalyptic number.

It is an amenable number.

164381465 is a deficient number, since it is larger than the sum of its proper divisors (32876299).

164381465 is an equidigital number, since it uses as much as digits as its factorization.

164381465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32876298.

The product of its digits is 69120, while the sum is 38.

The square root of 164381465 is about 12821.1335302305. The cubic root of 164381465 is about 547.7944344596.

The spelling of 164381465 in words is "one hundred sixty-four million, three hundred eighty-one thousand, four hundred sixty-five".