1645608968 has 48 divisors (see below), whose sum is σ = 3300879120. Its totient is φ = 768642336.

The previous prime is 1645608967. The next prime is 1645608989. The reversal of 1645608968 is 8698065461.

It is not an unprimeable number, because it can be changed into a prime (1645608967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177455 + ... + 186497.

It is an arithmetic number, because the mean of its divisors is an integer number (68768315).

Almost surely, 2^1645608968 is an apocalyptic number.

It is an amenable number.

1645608968 is an abundant number, since it is smaller than the sum of its proper divisors (1655270152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645608968 is a wasteful number, since it uses less digits than its factorization.

1645608968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138 (or 9111 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 1645608968 is about 40566.1061478668. The cubic root of 1645608968 is about 1180.6165905187.

The spelling of 1645608968 in words is "one billion, six hundred forty-five million, six hundred eight thousand, nine hundred sixty-eight".