138066547778813 has 8 divisors (see below), whose sum is σ = 141452104139136. Its totient is φ = 134681852351200.

The previous prime is 138066547778807. The next prime is 138066547778891. The reversal of 138066547778813 is 318877745660831.

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 138066547778813 - 2¹² = 138066547774717 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 (138066547778213) 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, 214908503 + ... + 215549988.

It is an arithmetic number, because the mean of its divisors is an integer number (17681513017392).

Almost surely, 2^{138066547778813} is an apocalyptic number.

It is an amenable number.

138066547778813 is a deficient number, since it is larger than the sum of its proper divisors (3385556360323).

138066547778813 is an equidigital number, since it uses as much as digits as its factorization.

138066547778813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430466355.

The product of its (nonzero) digits is 1137991680, while the sum is 74.

The spelling of 138066547778813 in words is "one hundred thirty-eight trillion, sixty-six billion, five hundred forty-seven million, seven hundred seventy-eight thousand, eight hundred thirteen".