1645441189168 has 60 divisors (see below), whose sum is σ = 3713641447152. Its totient is φ = 704218838400.

The previous prime is 1645441189153. The next prime is 1645441189177. The reversal of 1645441189168 is 8619811445461.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873483 + ... + 2013418.

Almost surely, 2^{1645441189168} is an apocalyptic number.

It is an amenable number.

1645441189168 is an abundant number, since it is smaller than the sum of its proper divisors (2068200257984).

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

1645441189168 is a wasteful number, since it uses less digits than its factorization.

1645441189168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887650 (or 2887637 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 58.

The spelling of 1645441189168 in words is "one trillion, six hundred forty-five billion, four hundred forty-one million, one hundred eighty-nine thousand, one hundred sixty-eight".