138878574684 has 24 divisors (see below), whose sum is σ = 324262821120. Its totient is φ = 46262456304.

The previous prime is 138878574641. The next prime is 138878574689. The reversal of 138878574684 is 486475878831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138878574689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3781204 + ... + 3817755.

It is an arithmetic number, because the mean of its divisors is an integer number (13510950880).

Almost surely, 2^138878574684 is an apocalyptic number.

It is an amenable number.

138878574684 is an abundant number, since it is smaller than the sum of its proper divisors (185384246436).

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

138878574684 is a wasteful number, since it uses less digits than its factorization.

138878574684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600489 (or 7600487 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 69.

The spelling of 138878574684 in words is "one hundred thirty-eight billion, eight hundred seventy-eight million, five hundred seventy-four thousand, six hundred eighty-four".