67454838138 has 32 divisors (see below), whose sum is σ = 138321824256. Its totient is φ = 21918336048.

The previous prime is 67454838137. The next prime is 67454838149. The reversal of 67454838138 is 83183845476.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (67454838131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130120 + ... + 389667.

It is an arithmetic number, because the mean of its divisors is an integer number (4322557008).

Almost surely, 2^67454838138 is an apocalyptic number.

67454838138 is an abundant number, since it is smaller than the sum of its proper divisors (70866986118).

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

67454838138 is a wasteful number, since it uses less digits than its factorization.

67454838138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520338.

The product of its digits is 15482880, while the sum is 57.

The spelling of 67454838138 in words is "sixty-seven billion, four hundred fifty-four million, eight hundred thirty-eight thousand, one hundred thirty-eight".