138675494581 has 8 divisors (see below), whose sum is σ = 154160351744. Its totient is φ = 123878853360.

The previous prime is 138675494569. The next prime is 138675494611. The reversal of 138675494581 is 185494576831.

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 138675494581 - 2¹⁷ = 138675363509 is a prime.

It is a super-2 number, since 2×138675494581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138675494281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 172053561 + ... + 172054366.

It is an arithmetic number, because the mean of its divisors is an integer number (19270043968).

Almost surely, 2^138675494581 is an apocalyptic number.

It is an amenable number.

138675494581 is a deficient number, since it is larger than the sum of its proper divisors (15484857163).

138675494581 is a wasteful number, since it uses less digits than its factorization.

138675494581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344107971.

The product of its digits is 29030400, while the sum is 61.

The spelling of 138675494581 in words is "one hundred thirty-eight billion, six hundred seventy-five million, four hundred ninety-four thousand, five hundred eighty-one".