1994545668 has 24 divisors (see below), whose sum is σ = 4690588672. Its totient is φ = 659613024.

The previous prime is 1994545613. The next prime is 1994545699. The reversal of 1994545668 is 8665454991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652855 + ... + 655902.

Almost surely, 2^1994545668 is an apocalyptic number.

It is an amenable number.

1994545668 is an abundant number, since it is smaller than the sum of its proper divisors (2696043004).

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

1994545668 is a wasteful number, since it uses less digits than its factorization.

1994545668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308891 (or 1308889 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 57.

The square root of 1994545668 is about 44660.3366310645. The cubic root of 1994545668 is about 1258.7746691890.

The spelling of 1994545668 in words is "one billion, nine hundred ninety-four million, five hundred forty-five thousand, six hundred sixty-eight".