138247125085 has 8 divisors (see below), whose sum is σ = 165935400120. Its totient is φ = 110571800064.

The previous prime is 138247125083. The next prime is 138247125113. The reversal of 138247125085 is 580521742831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 669929689 + 137577195396 = 25883^2 + 370914^2 .

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 138247125085 - 2¹ = 138247125083 is a prime.

It is a super-2 number, since 2×138247125085² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138247125083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3214000 + ... + 3256729.

It is an arithmetic number, because the mean of its divisors is an integer number (20741925015).

Almost surely, 2^138247125085 is an apocalyptic number.

It is an amenable number.

138247125085 is a deficient number, since it is larger than the sum of its proper divisors (27688275035).

138247125085 is an equidigital number, since it uses as much as digits as its factorization.

138247125085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475007.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 138247125085 in words is "one hundred thirty-eight billion, two hundred forty-seven million, one hundred twenty-five thousand, eighty-five".