68444733240 has 256 divisors, whose sum is σ = 250929100800. Its totient is φ = 16489308672.

The previous prime is 68444733221. The next prime is 68444733263. The reversal of 68444733240 is 4233744486.

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

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, 608019 + ... + 711741.

It is an arithmetic number, because the mean of its divisors is an integer number (980191800).

Almost surely, 2^68444733240 is an apocalyptic number.

68444733240 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 68444733240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125464550400).

68444733240 is an abundant number, since it is smaller than the sum of its proper divisors (182484367560).

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

68444733240 is a wasteful number, since it uses less digits than its factorization.

68444733240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103803 (or 103793 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 45.

The spelling of 68444733240 in words is "sixty-eight billion, four hundred forty-four million, seven hundred thirty-three thousand, two hundred forty".