68641031888 has 240 divisors, whose sum is σ = 163263675456. Its totient is φ = 27690024960.

The previous prime is 68641031873. The next prime is 68641031923. The reversal of 68641031888 is 88813014686.

It is a super-3 number, since 3×68641031888³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106750895 + ... + 106751537.

Almost surely, 2^68641031888 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 68641031888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81631837728).

68641031888 is an abundant number, since it is smaller than the sum of its proper divisors (94622643568).

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

68641031888 is a wasteful number, since it uses less digits than its factorization.

68641031888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 53.

The spelling of 68641031888 in words is "sixty-eight billion, six hundred forty-one million, thirty-one thousand, eight hundred eighty-eight".