138820643886616 has 16 divisors (see below), whose sum is σ = 263424715810200. Its totient is φ = 68574053003904.

The previous prime is 138820643886593. The next prime is 138820643886637. The reversal of 138820643886616 is 616688346028831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104533616721 + ... + 104533618048.

Almost surely, 2^{138820643886616} is an apocalyptic number.

It is an amenable number.

138820643886616 is a deficient number, since it is larger than the sum of its proper divisors (124604071923584).

138820643886616 is a wasteful number, since it uses less digits than its factorization.

138820643886616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209067234858 (or 209067234854 counting only the distinct ones).

The product of its (nonzero) digits is 382205952, while the sum is 70.

The spelling of 138820643886616 in words is "one hundred thirty-eight trillion, eight hundred twenty billion, six hundred forty-three million, eight hundred eighty-six thousand, six hundred sixteen".