138945134374806 has 32 divisors (see below), whose sum is σ = 294243445633248. Its totient is φ = 43589639208960.

The previous prime is 138945134374799. The next prime is 138945134374853. The reversal of 138945134374806 is 608473431549831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10973035 + ... + 19957398.

It is an arithmetic number, because the mean of its divisors is an integer number (9195107676039).

Almost surely, 2^{138945134374806} is an apocalyptic number.

138945134374806 is an abundant number, since it is smaller than the sum of its proper divisors (155298311258442).

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

138945134374806 is a wasteful number, since it uses less digits than its factorization.

138945134374806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30974496.

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 138945134374806 in words is "one hundred thirty-eight trillion, nine hundred forty-five billion, one hundred thirty-four million, three hundred seventy-four thousand, eight hundred six".