138503125613 has 8 divisors (see below), whose sum is σ = 141122403576. Its totient is φ = 135884070400.

The previous prime is 138503125609. The next prime is 138503125633. The reversal of 138503125613 is 316521305831.

It can be written as a sum of positive squares in 4 ways, for example, as 37393117129 + 101110008484 = 193373^2 + 317978^2 .

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 138503125613 - 2² = 138503125609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138503125633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1744133 + ... + 1821813.

It is an arithmetic number, because the mean of its divisors is an integer number (17640300447).

Almost surely, 2^138503125613 is an apocalyptic number.

It is an amenable number.

138503125613 is a deficient number, since it is larger than the sum of its proper divisors (2619277963).

138503125613 is an equidigital number, since it uses as much as digits as its factorization.

138503125613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111375.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 138503125613 in words is "one hundred thirty-eight billion, five hundred three million, one hundred twenty-five thousand, six hundred thirteen".