67645726848 has 192 divisors, whose sum is σ = 227200446720. Its totient is φ = 18916024320.

The previous prime is 67645726807. The next prime is 67645726853. The reversal of 67645726848 is 84862754676.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289768 + ... + 468248.

It is an arithmetic number, because the mean of its divisors is an integer number (1183335660).

Almost surely, 2^67645726848 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 67645726848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113600223360).

67645726848 is an abundant number, since it is smaller than the sum of its proper divisors (159554719872).

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

67645726848 is a wasteful number, since it uses less digits than its factorization.

67645726848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178555 (or 178540 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 67645726848 in words is "sixty-seven billion, six hundred forty-five million, seven hundred twenty-six thousand, eight hundred forty-eight".