1664352115 has 4 divisors (see below), whose sum is σ = 1997222544. Its totient is φ = 1331481688.

The previous prime is 1664352103. The next prime is 1664352229. The reversal of 1664352115 is 5112534661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1664352115 - 2⁹ = 1664351603 is a prime.

It is a Duffinian number.

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, 166435207 + ... + 166435216.

It is an arithmetic number, because the mean of its divisors is an integer number (499305636).

Almost surely, 2^1664352115 is an apocalyptic number.

1664352115 is a deficient number, since it is larger than the sum of its proper divisors (332870429).

1664352115 is an equidigital number, since it uses as much as digits as its factorization.

1664352115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332870428.

The product of its digits is 21600, while the sum is 34.

The square root of 1664352115 is about 40796.4718450015. The cubic root of 1664352115 is about 1185.0820063480.

Adding to 1664352115 its reverse (5112534661), we get a palindrome (6776886776).

The spelling of 1664352115 in words is "one billion, six hundred sixty-four million, three hundred fifty-two thousand, one hundred fifteen".