67728637734 has 32 divisors (see below), whose sum is σ = 137343354720. Its totient is φ = 22266182016.

The previous prime is 67728637703. The next prime is 67728637759. The reversal of 67728637734 is 43773682776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2319594 + ... + 2348610.

It is an arithmetic number, because the mean of its divisors is an integer number (4291979835).

Almost surely, 2^67728637734 is an apocalyptic number.

67728637734 is an abundant number, since it is smaller than the sum of its proper divisors (69614716986).

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

67728637734 is an frugal number, since it uses more digits than its factorization.

67728637734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29241 (or 29095 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 60.

The spelling of 67728637734 in words is "sixty-seven billion, seven hundred twenty-eight million, six hundred thirty-seven thousand, seven hundred thirty-four".