68985181440 has 576 divisors, whose sum is σ = 289450022400. Its totient is φ = 15222767616.

The previous prime is 68985181409. The next prime is 68985181459. The reversal of 68985181440 is 4418158986.

It is a happy number.

68985181440 is a `hidden beast` number, since 6 + 89 + 8 + 518 + 1 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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 63 ways as a sum of consecutive naturals, for example, 7010764 + ... + 7020596.

It is an arithmetic number, because the mean of its divisors is an integer number (502517400).

Almost surely, 2^68985181440 is an apocalyptic number.

68985181440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68985181440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144725011200).

68985181440 is an abundant number, since it is smaller than the sum of its proper divisors (220464840960).

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

68985181440 is a wasteful number, since it uses less digits than its factorization.

68985181440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899 (or 9879 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 68985181440 in words is "sixty-eight billion, nine hundred eighty-five million, one hundred eighty-one thousand, four hundred forty".