164635505 has 4 divisors (see below), whose sum is σ = 197562612. Its totient is φ = 131708400.

The previous prime is 164635489. The next prime is 164635511. The reversal of 164635505 is 505536461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505536461 = 73 ⋅6925157.

It can be written as a sum of positive squares in 2 ways, for example, as 98327056 + 66308449 = 9916^2 + 8143^2 .

It is not a de Polignac number, because 164635505 - 2⁴ = 164635489 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, 16463546 + ... + 16463555.

It is an arithmetic number, because the mean of its divisors is an integer number (49390653).

Almost surely, 2^164635505 is an apocalyptic number.

It is an amenable number.

164635505 is a deficient number, since it is larger than the sum of its proper divisors (32927107).

164635505 is an equidigital number, since it uses as much as digits as its factorization.

164635505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32927106.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 164635505 is about 12831.0367858564. The cubic root of 164635505 is about 548.0764818129.

The spelling of 164635505 in words is "one hundred sixty-four million, six hundred thirty-five thousand, five hundred five".