138878061416812 has 24 divisors (see below), whose sum is σ = 243555189292800. Its totient is φ = 69290969085696.

The previous prime is 138878061416771. The next prime is 138878061416821. The reversal of 138878061416812 is 218614160878831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7763887 + ... + 18385702.

It is an arithmetic number, because the mean of its divisors is an integer number (10148132887200).

Almost surely, 2^{138878061416812} is an apocalyptic number.

It is an amenable number.

138878061416812 is a deficient number, since it is larger than the sum of its proper divisors (104677127875988).

138878061416812 is a wasteful number, since it uses less digits than its factorization.

138878061416812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26152425 (or 26152423 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 64.

The spelling of 138878061416812 in words is "one hundred thirty-eight trillion, eight hundred seventy-eight billion, sixty-one million, four hundred sixteen thousand, eight hundred twelve".