1640204168 has 32 divisors (see below), whose sum is σ = 3128328000. Its totient is φ = 806084928.

The previous prime is 1640204113. The next prime is 1640204179. The reversal of 1640204168 is 8614020461.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 125930 + ... + 138342.

It is an arithmetic number, because the mean of its divisors is an integer number (97760250).

Almost surely, 2^1640204168 is an apocalyptic number.

It is an amenable number.

1640204168 is a deficient number, since it is larger than the sum of its proper divisors (1488123832).

1640204168 is a wasteful number, since it uses less digits than its factorization.

1640204168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12701 (or 12697 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1640204168 is about 40499.4341688869. The cubic root of 1640204168 is about 1179.3226429461.

The spelling of 1640204168 in words is "one billion, six hundred forty million, two hundred four thousand, one hundred sixty-eight".