164266049 has 4 divisors (see below), whose sum is σ = 168272580. Its totient is φ = 160259520.

The previous prime is 164265989. The next prime is 164266073. The reversal of 164266049 is 940662461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940662461 = 379 ⋅2481959.

It can be written as a sum of positive squares in 2 ways, for example, as 50694400 + 113571649 = 7120^2 + 10657^2 .

It is a cyclic number.

It is not a de Polignac number, because 164266049 - 2¹⁶ = 164200513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164266099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003204 + ... + 2003285.

It is an arithmetic number, because the mean of its divisors is an integer number (42068145).

Almost surely, 2^164266049 is an apocalyptic number.

It is an amenable number.

164266049 is a deficient number, since it is larger than the sum of its proper divisors (4006531).

164266049 is an equidigital number, since it uses as much as digits as its factorization.

164266049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006530.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 164266049 is about 12816.6317338059. The cubic root of 164266049 is about 547.6661980933. Note that the first 3 decimals are identical.

The spelling of 164266049 in words is "one hundred sixty-four million, two hundred sixty-six thousand, forty-nine".