1664385319 has 16 divisors (see below), whose sum is σ = 1774479616. Its totient is φ = 1558310400.

The previous prime is 1664385301. The next prime is 1664385329. The reversal of 1664385319 is 9135834661.

It is a cyclic number.

It is not a de Polignac number, because 1664385319 - 2¹⁵ = 1664352551 is a prime.

It is a super-2 number, since 2×1664385319² = 5540356980205463522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664385329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203599 + ... + 211615.

It is an arithmetic number, because the mean of its divisors is an integer number (110904976).

Almost surely, 2^1664385319 is an apocalyptic number.

1664385319 is a deficient number, since it is larger than the sum of its proper divisors (110094297).

1664385319 is a wasteful number, since it uses less digits than its factorization.

1664385319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266.

The product of its digits is 466560, while the sum is 46.

The square root of 1664385319 is about 40796.8787899271. The cubic root of 1664385319 is about 1185.0898871325.

The spelling of 1664385319 in words is "one billion, six hundred sixty-four million, three hundred eighty-five thousand, three hundred nineteen".