68459005440 has 1920 divisors, whose sum is σ = 317398435200. Its totient is φ = 13872660480.

The previous prime is 68459005361. The next prime is 68459005441. The reversal of 68459005440 is 4450095486.

68459005440 is a `hidden beast` number, since 6 + 8 + 4 + 590 + 0 + 54 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68459005441) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1669731820 + ... + 1669731860.

It is an arithmetic number, because the mean of its divisors is an integer number (165311685).

Almost surely, 2^68459005440 is an apocalyptic number.

68459005440 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 68459005440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158699217600).

68459005440 is an abundant number, since it is smaller than the sum of its proper divisors (248939429760).

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

68459005440 is a wasteful number, since it uses less digits than its factorization.

68459005440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 68459005440 in words is "sixty-eight billion, four hundred fifty-nine million, five thousand, four hundred forty".