19653445168 has 80 divisors (see below), whose sum is σ = 45958058496. Its totient is φ = 7959536640.

The previous prime is 19653445159. The next prime is 19653445181. The reversal of 19653445168 is 86154435691.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 167848 + ... + 259768.

Almost surely, 2^19653445168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19653445168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22979029248).

19653445168 is an abundant number, since it is smaller than the sum of its proper divisors (26304613328).

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

19653445168 is a wasteful number, since it uses less digits than its factorization.

19653445168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92042 (or 92036 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The spelling of 19653445168 in words is "nineteen billion, six hundred fifty-three million, four hundred forty-five thousand, one hundred sixty-eight".