138085374452 has 6 divisors (see below), whose sum is σ = 241649405298. Its totient is φ = 69042687224.

The previous prime is 138085374407. The next prime is 138085374457. The reversal of 138085374452 is 254473580831.

It can be written as a sum of positive squares in only one way, i.e., 78430242916 + 59655131536 = 280054^2 + 244244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138085374452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138085374457) 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 as a sum of consecutive naturals, namely, 17260671803 + ... + 17260671810.

It is an arithmetic number, because the mean of its divisors is an integer number (40274900883).

Almost surely, 2^138085374452 is an apocalyptic number.

It is an amenable number.

138085374452 is a deficient number, since it is larger than the sum of its proper divisors (103564030846).

138085374452 is a wasteful number, since it uses less digits than its factorization.

138085374452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34521343617 (or 34521343615 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 138085374452 in words is "one hundred thirty-eight billion, eighty-five million, three hundred seventy-four thousand, four hundred fifty-two".