138166504741 has 4 divisors (see below), whose sum is σ = 138214800684. Its totient is φ = 138118208800.

The previous prime is 138166504691. The next prime is 138166504753. The reversal of 138166504741 is 147405661831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116001548100 + 22164956641 = 340590^2 + 148879^2 .

It is a cyclic number.

It is not a de Polignac number, because 138166504741 - 2¹¹ = 138166502693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138166504691 and 138166504700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138166504781) 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 3 ways as a sum of consecutive naturals, for example, 24143680 + ... + 24149401.

It is an arithmetic number, because the mean of its divisors is an integer number (34553700171).

Almost surely, 2^138166504741 is an apocalyptic number.

It is an amenable number.

138166504741 is a deficient number, since it is larger than the sum of its proper divisors (48295943).

138166504741 is an equidigital number, since it uses as much as digits as its factorization.

138166504741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48295942.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 138166504741 in words is "one hundred thirty-eight billion, one hundred sixty-six million, five hundred four thousand, seven hundred forty-one".