138548220985 has 8 divisors (see below), whose sum is σ = 173486468160. Its totient is φ = 106019508144.

The previous prime is 138548220973. The next prime is 138548220997. The reversal of 138548220985 is 589022845831.

It is an interprime number because it is at equal distance from previous prime (138548220973) and next prime (138548220997).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138548220985 - 2²³ = 138539832377 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602383455 + ... + 602383684.

It is an arithmetic number, because the mean of its divisors is an integer number (21685808520).

Almost surely, 2^138548220985 is an apocalyptic number.

It is an amenable number.

138548220985 is a deficient number, since it is larger than the sum of its proper divisors (34938247175).

138548220985 is a wasteful number, since it uses less digits than its factorization.

138548220985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204767167.

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 138548220985 in words is "one hundred thirty-eight billion, five hundred forty-eight million, two hundred twenty thousand, nine hundred eighty-five".