138198078627 has 32 divisors (see below), whose sum is σ = 211144009728. Its totient is φ = 78761932416.

The previous prime is 138198078617. The next prime is 138198078673. The reversal of 138198078627 is 726870891831.

It is not a de Polignac number, because 138198078627 - 2¹⁰ = 138198077603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138198078607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14194053 + ... + 14203785.

It is an arithmetic number, because the mean of its divisors is an integer number (6598250304).

Almost surely, 2^138198078627 is an apocalyptic number.

138198078627 is a deficient number, since it is larger than the sum of its proper divisors (72945931101).

138198078627 is a wasteful number, since it uses less digits than its factorization.

138198078627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11459.

The product of its (nonzero) digits is 8128512, while the sum is 60.

The spelling of 138198078627 in words is "one hundred thirty-eight billion, one hundred ninety-eight million, seventy-eight thousand, six hundred twenty-seven".