138230136145 has 4 divisors (see below), whose sum is σ = 165876163380. Its totient is φ = 110584108912.

The previous prime is 138230136097. The next prime is 138230136173. The reversal of 138230136145 is 541631032831.

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 82121791761 + 56108344384 = 286569^2 + 236872^2 .

It is a cyclic number.

It is not a de Polignac number, because 138230136145 - 2⁷ = 138230136017 is a prime.

It is a super-2 number, since 2×138230136145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13823013610 + ... + 13823013619.

It is an arithmetic number, because the mean of its divisors is an integer number (41469040845).

Almost surely, 2^138230136145 is an apocalyptic number.

It is an amenable number.

138230136145 is a deficient number, since it is larger than the sum of its proper divisors (27646027235).

138230136145 is an equidigital number, since it uses as much as digits as its factorization.

138230136145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27646027234.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 138230136145 its reverse (541631032831), we get a palindrome (679861168976).

The spelling of 138230136145 in words is "one hundred thirty-eight billion, two hundred thirty million, one hundred thirty-six thousand, one hundred forty-five".