67845728724 has 24 divisors (see below), whose sum is σ = 160536374208. Its totient is φ = 22296718080.

The previous prime is 67845728701. The next prime is 67845728749. The reversal of 67845728724 is 42782754876.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 39814717 + ... + 39816420.

It is an arithmetic number, because the mean of its divisors is an integer number (6689015592).

Almost surely, 2^67845728724 is an apocalyptic number.

It is an amenable number.

67845728724 is an abundant number, since it is smaller than the sum of its proper divisors (92690645484).

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

67845728724 is a wasteful number, since it uses less digits than its factorization.

67845728724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79631215 (or 79631213 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 60.

The spelling of 67845728724 in words is "sixty-seven billion, eight hundred forty-five million, seven hundred twenty-eight thousand, seven hundred twenty-four".