138775661850608 has 20 divisors (see below), whose sum is σ = 269043104778360. Its totient is φ = 69345183198144.

The previous prime is 138775661850607. The next prime is 138775661850697. The reversal of 138775661850608 is 806058166577831.

It is a super-4 number, since 4×138775661850608⁴ (a number of 58 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138775661850607) 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, 2665456103 + ... + 2665508166.

It is an arithmetic number, because the mean of its divisors is an integer number (13452155238918).

Almost surely, 2^{138775661850608} is an apocalyptic number.

It is an amenable number.

138775661850608 is a deficient number, since it is larger than the sum of its proper divisors (130267442927752).

138775661850608 is a wasteful number, since it uses less digits than its factorization.

138775661850608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330965904 (or 5330965898 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 71.

The spelling of 138775661850608 in words is "one hundred thirty-eight trillion, seven hundred seventy-five billion, six hundred sixty-one million, eight hundred fifty thousand, six hundred eight".