1664035788328 has 16 divisors (see below), whose sum is σ = 3120142870260. Its totient is φ = 831997689600.

The previous prime is 1664035788313. The next prime is 1664035788341. The reversal of 1664035788328 is 8238875304661.

It can be written as a sum of positive squares in 2 ways, for example, as 1650294791044 + 13740997284 = 1284638^2 + 117222^2 .

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, 2172643 + ... + 2836978.

Almost surely, 2^{1664035788328} is an apocalyptic number.

It is an amenable number.

1664035788328 is a deficient number, since it is larger than the sum of its proper divisors (1456107081932).

1664035788328 is a wasteful number, since it uses less digits than its factorization.

1664035788328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051148 (or 5051144 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 1664035788328 in words is "one trillion, six hundred sixty-four billion, thirty-five million, seven hundred eighty-eight thousand, three hundred twenty-eight".