67943993540 has 24 divisors (see below), whose sum is σ = 150191986560. Its totient is φ = 25747197408.

The previous prime is 67943993503. The next prime is 67943993543. The reversal of 67943993540 is 4539934976.

It is a self number, because there is not a number n which added to its sum of digits gives 67943993540.

It is not an unprimeable number, because it can be changed into a prime (67943993543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89399612 + ... + 89400371.

It is an arithmetic number, because the mean of its divisors is an integer number (6257999440).

Almost surely, 2^67943993540 is an apocalyptic number.

It is an amenable number.

67943993540 is an abundant number, since it is smaller than the sum of its proper divisors (82247993020).

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

67943993540 is a wasteful number, since it uses less digits than its factorization.

67943993540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178800011 (or 178800009 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 59.

The spelling of 67943993540 in words is "sixty-seven billion, nine hundred forty-three million, nine hundred ninety-three thousand, five hundred forty".