138663178358516 has 24 divisors (see below), whose sum is σ = 280836816933120. Its totient is φ = 58674834964512.

The previous prime is 138663178358503. The next prime is 138663178358527. The reversal of 138663178358516 is 615853871366831.

It is a self number, because there is not a number n which added to its sum of digits gives 138663178358516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31343392535 + ... + 31343396958.

It is an arithmetic number, because the mean of its divisors is an integer number (11701534038880).

Almost surely, 2^{138663178358516} is an apocalyptic number.

It is an amenable number.

138663178358516 is an abundant number, since it is smaller than the sum of its proper divisors (142173638574604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138663178358516 is a wasteful number, since it uses less digits than its factorization.

138663178358516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62686789583 (or 62686789581 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 71.

The spelling of 138663178358516 in words is "one hundred thirty-eight trillion, six hundred sixty-three billion, one hundred seventy-eight million, three hundred fifty-eight thousand, five hundred sixteen".