1640885608 has 16 divisors (see below), whose sum is σ = 3085236000. Its totient is φ = 818156016.

The previous prime is 1640885591. The next prime is 1640885663. The reversal of 1640885608 is 8065880461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282798 + ... + 288541.

It is an arithmetic number, because the mean of its divisors is an integer number (192827250).

Almost surely, 2^1640885608 is an apocalyptic number.

It is an amenable number.

1640885608 is a deficient number, since it is larger than the sum of its proper divisors (1444350392).

1640885608 is a wasteful number, since it uses less digits than its factorization.

1640885608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571704 (or 571700 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 1640885608 is about 40507.8462523003. The cubic root of 1640885608 is about 1179.4859409813.

The spelling of 1640885608 in words is "one billion, six hundred forty million, eight hundred eighty-five thousand, six hundred eight".