138613786187 has 4 divisors (see below), whose sum is σ = 138622169616. Its totient is φ = 138605402760.

The previous prime is 138613786169. The next prime is 138613786217. The reversal of 138613786187 is 781687316831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138613786187 - 2¹⁸ = 138613524043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138613786117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4166864 + ... + 4199997.

It is an arithmetic number, because the mean of its divisors is an integer number (34655542404).

Almost surely, 2^138613786187 is an apocalyptic number.

138613786187 is a deficient number, since it is larger than the sum of its proper divisors (8383429).

138613786187 is an equidigital number, since it uses as much as digits as its factorization.

138613786187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8383428.

The product of its digits is 8128512, while the sum is 59.

The spelling of 138613786187 in words is "one hundred thirty-eight billion, six hundred thirteen million, seven hundred eighty-six thousand, one hundred eighty-seven".