68844619989 has 6 divisors (see below), whose sum is σ = 99442228886. Its totient is φ = 45896413320.

The previous prime is 68844619967. The next prime is 68844619997. The reversal of 68844619989 is 98991644886.

68844619989 is a `hidden beast` number, since 6 + 8 + 84 + 461 + 9 + 9 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 66889476900 + 1955143089 = 258630^2 + 44217^2 .

It is not a de Polignac number, because 68844619989 - 2⁸ = 68844619733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68844619189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3824701102 + ... + 3824701119.

Almost surely, 2^68844619989 is an apocalyptic number.

It is an amenable number.

68844619989 is a deficient number, since it is larger than the sum of its proper divisors (30597608897).

68844619989 is a wasteful number, since it uses less digits than its factorization.

68844619989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649402227 (or 7649402224 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 72.

The spelling of 68844619989 in words is "sixty-eight billion, eight hundred forty-four million, six hundred nineteen thousand, nine hundred eighty-nine".