164145545 has 4 divisors (see below), whose sum is σ = 196974660. Its totient is φ = 131316432.

The previous prime is 164145533. The next prime is 164145587. The reversal of 164145545 is 545541461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545541461 = 467 ⋅1168183.

It can be written as a sum of positive squares in 2 ways, for example, as 107910544 + 56235001 = 10388^2 + 7499^2 .

It is a cyclic number.

It is not a de Polignac number, because 164145545 - 2⁴ = 164145529 is a prime.

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, 16414550 + ... + 16414559.

It is an arithmetic number, because the mean of its divisors is an integer number (49243665).

Almost surely, 2^164145545 is an apocalyptic number.

It is an amenable number.

164145545 is a deficient number, since it is larger than the sum of its proper divisors (32829115).

164145545 is an equidigital number, since it uses as much as digits as its factorization.

164145545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32829114.

The product of its digits is 48000, while the sum is 35.

The square root of 164145545 is about 12811.9297921898. The cubic root of 164145545 is about 547.5322444400.

The spelling of 164145545 in words is "one hundred sixty-four million, one hundred forty-five thousand, five hundred forty-five".