1664452317 has 8 divisors (see below), whose sum is σ = 2421021600. Its totient is φ = 1008758960.

The previous prime is 1664452291. The next prime is 1664452357. The reversal of 1664452317 is 7132544661.

It is a happy number.

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

It is not a de Polignac number, because 1664452317 - 2⁶ = 1664452253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664452357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25218942 + ... + 25219007.

It is an arithmetic number, because the mean of its divisors is an integer number (302627700).

Almost surely, 2^1664452317 is an apocalyptic number.

It is an amenable number.

1664452317 is a deficient number, since it is larger than the sum of its proper divisors (756569283).

1664452317 is a wasteful number, since it uses less digits than its factorization.

1664452317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50437963.

The product of its digits is 120960, while the sum is 39.

The square root of 1664452317 is about 40797.6998984011. The cubic root of 1664452317 is about 1185.1057884157.

Adding to 1664452317 its reverse (7132544661), we get a palindrome (8796996978).

The spelling of 1664452317 in words is "one billion, six hundred sixty-four million, four hundred fifty-two thousand, three hundred seventeen".