138580845987 has 18 divisors (see below), whose sum is σ = 185887546444. Its totient is φ = 91834008560.

The previous prime is 138580845961. The next prime is 138580845989. The reversal of 138580845987 is 789548085831.

It is not a de Polignac number, because 138580845987 - 2¹⁵ = 138580813219 is a prime.

It is a super-5 number, since 5×138580845987⁵ (a number of 57 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138580845989) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 127021312 + ... + 127022402.

Almost surely, 2^138580845987 is an apocalyptic number.

138580845987 is a deficient number, since it is larger than the sum of its proper divisors (47306700457).

138580845987 is an frugal number, since it uses more digits than its factorization.

138580845987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 66.

The spelling of 138580845987 in words is "one hundred thirty-eight billion, five hundred eighty million, eight hundred forty-five thousand, nine hundred eighty-seven".