67733712138 has 16 divisors (see below), whose sum is σ = 141357312576. Its totient is φ = 21596256000.

The previous prime is 67733712097. The next prime is 67733712139. The reversal of 67733712138 is 83121733776.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67733712139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245411863 + ... + 245412138.

It is an arithmetic number, because the mean of its divisors is an integer number (8834832036).

Almost surely, 2^67733712138 is an apocalyptic number.

67733712138 is an abundant number, since it is smaller than the sum of its proper divisors (73623600438).

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

67733712138 is a wasteful number, since it uses less digits than its factorization.

67733712138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490824029.

The product of its digits is 889056, while the sum is 48.

The spelling of 67733712138 in words is "sixty-seven billion, seven hundred thirty-three million, seven hundred twelve thousand, one hundred thirty-eight".