1640323312 has 40 divisors (see below), whose sum is σ = 3270719232. Its totient is φ = 796536000.

The previous prime is 1640323309. The next prime is 1640323313. The reversal of 1640323312 is 2133230461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640323313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90187 + ... + 106837.

Almost surely, 2^1640323312 is an apocalyptic number.

It is an amenable number.

1640323312 is a deficient number, since it is larger than the sum of its proper divisors (1630395920).

1640323312 is a wasteful number, since it uses less digits than its factorization.

1640323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16837 (or 16831 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1640323312 is about 40500.9050763066. The cubic root of 1640323312 is about 1179.3511974837.

Adding to 1640323312 its reverse (2133230461), we get a palindrome (3773553773).

The spelling of 1640323312 in words is "one billion, six hundred forty million, three hundred twenty-three thousand, three hundred twelve".