138276774307208 has 16 divisors (see below), whose sum is σ = 274520066639580. Its totient is φ = 65071423203328.

The previous prime is 138276774307201. The next prime is 138276774307237. The reversal of 138276774307208 is 802703477672831.

It can be written as a sum of positive squares in 2 ways, for example, as 121935436983844 + 16341337323364 = 11042438^2 + 4042442^2 .

It is not an unprimeable number, because it can be changed into a prime (138276774307201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508370493641 + ... + 508370493912.

Almost surely, 2^{138276774307208} is an apocalyptic number.

It is an amenable number.

138276774307208 is a deficient number, since it is larger than the sum of its proper divisors (136243292332372).

138276774307208 is a wasteful number, since it uses less digits than its factorization.

138276774307208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016740987576 (or 1016740987572 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 65.

The spelling of 138276774307208 in words is "one hundred thirty-eight trillion, two hundred seventy-six billion, seven hundred seventy-four million, three hundred seven thousand, two hundred eight".