68955561144 has 160 divisors (see below), whose sum is σ = 196549254000. Its totient is φ = 22581877248.

The previous prime is 68955561133. The next prime is 68955561163. The reversal of 68955561144 is 44116555986.

It is a happy number.

68955561144 is a `hidden beast` number, since 6 + 89 + 5 + 556 + 1 + 1 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12722067 + ... + 12727485.

Almost surely, 2^68955561144 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 68955561144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98274627000).

68955561144 is an abundant number, since it is smaller than the sum of its proper divisors (127593692856).

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

68955561144 is a wasteful number, since it uses less digits than its factorization.

68955561144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779 (or 5766 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 68955561144 in words is "sixty-eight billion, nine hundred fifty-five million, five hundred sixty-one thousand, one hundred forty-four".