138207246508 has 18 divisors (see below), whose sum is σ = 245483382116. Its totient is φ = 68069228304.

The previous prime is 138207246497. The next prime is 138207246521. The reversal of 138207246508 is 805642702831.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6074658 + ... + 6097366.

Almost surely, 2^138207246508 is an apocalyptic number.

It is an amenable number.

138207246508 is a deficient number, since it is larger than the sum of its proper divisors (107276135608).

138207246508 is an frugal number, since it uses more digits than its factorization.

138207246508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45489 (or 22778 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 138207246508 in words is "one hundred thirty-eight billion, two hundred seven million, two hundred forty-six thousand, five hundred eight".