138878084613208 has 32 divisors (see below), whose sum is σ = 263203673765760. Its totient is φ = 68691106391040.

The previous prime is 138878084613173. The next prime is 138878084613253. The reversal of 138878084613208 is 802316480878831.

It is a super-3 number, since 3×138878084613208³ (a number of 43 digits) contains 333 as substring.

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, 40093123 + ... + 43419058.

It is an arithmetic number, because the mean of its divisors is an integer number (8225114805180).

Almost surely, 2^{138878084613208} is an apocalyptic number.

It is an amenable number.

138878084613208 is a deficient number, since it is larger than the sum of its proper divisors (124325589152552).

138878084613208 is a wasteful number, since it uses less digits than its factorization.

138878084613208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83514427 (or 83514423 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 67.

The spelling of 138878084613208 in words is "one hundred thirty-eight trillion, eight hundred seventy-eight billion, eighty-four million, six hundred thirteen thousand, two hundred eight".