1601664239 has 8 divisors (see below), whose sum is σ = 1830738048. Its totient is φ = 1372656600.

The previous prime is 1601664227. The next prime is 1601664241. The reversal of 1601664239 is 9324661061.

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

It is not a de Polignac number, because 1601664239 - 2²⁸ = 1333228783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601664289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57344 + ... + 80570.

It is an arithmetic number, because the mean of its divisors is an integer number (228842256).

Almost surely, 2^1601664239 is an apocalyptic number.

1601664239 is a deficient number, since it is larger than the sum of its proper divisors (229073809).

1601664239 is an equidigital number, since it uses as much as digits as its factorization.

1601664239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33085.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1601664239 is about 40020.7975807579. The cubic root of 1601664239 is about 1170.0124767949.

The spelling of 1601664239 in words is "one billion, six hundred one million, six hundred sixty-four thousand, two hundred thirty-nine".