67944642840 has 48 divisors (see below), whose sum is σ = 220820090400. Its totient is φ = 18118571328.

The previous prime is 67944642811. The next prime is 67944642841. The reversal of 67944642840 is 4824644976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67944642841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94367200 + ... + 94367919.

It is an arithmetic number, because the mean of its divisors is an integer number (4600418550).

Almost surely, 2^67944642840 is an apocalyptic number.

67944642840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67944642840 is an abundant number, since it is smaller than the sum of its proper divisors (152875447560).

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

67944642840 is a wasteful number, since it uses less digits than its factorization.

67944642840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188735136 (or 188735129 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 67944642840 in words is "sixty-seven billion, nine hundred forty-four million, six hundred forty-two thousand, eight hundred forty".