138762251441813 has 4 divisors (see below), whose sum is σ = 142512582561900. Its totient is φ = 135011920321728.

The previous prime is 138762251441789. The next prime is 138762251441819. The reversal of 138762251441813 is 318144152267831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121082227965169 + 17680023476644 = 11003737^2 + 4204762^2 .

It is a cyclic number.

It is not a de Polignac number, because 138762251441813 - 2⁸ = 138762251441557 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 (138762251441819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1875165559988 + ... + 1875165560061.

It is an arithmetic number, because the mean of its divisors is an integer number (35628145640475).

Almost surely, 2^{138762251441813} is an apocalyptic number.

It is an amenable number.

138762251441813 is a deficient number, since it is larger than the sum of its proper divisors (3750331120087).

138762251441813 is an equidigital number, since it uses as much as digits as its factorization.

138762251441813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750331120086.

The product of its digits is 7741440, while the sum is 56.

The spelling of 138762251441813 in words is "one hundred thirty-eight trillion, seven hundred sixty-two billion, two hundred fifty-one million, four hundred forty-one thousand, eight hundred thirteen".