138530530545 has 64 divisors (see below), whose sum is σ = 256050063360. Its totient is φ = 63249984000.

The previous prime is 138530530531. The next prime is 138530530547. The reversal of 138530530545 is 545035035831.

It is a happy number.

It is not a de Polignac number, because 138530530545 - 2³² = 134235563249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138530530497 and 138530530506.

It is not an unprimeable number, because it can be changed into a prime (138530530547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 391245 + ... + 655845.

It is an arithmetic number, because the mean of its divisors is an integer number (4000782240).

Almost surely, 2^138530530545 is an apocalyptic number.

138530530545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138530530545 is a deficient number, since it is larger than the sum of its proper divisors (117519532815).

138530530545 is a wasteful number, since it uses less digits than its factorization.

138530530545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264806.

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 138530530545 in words is "one hundred thirty-eight billion, five hundred thirty million, five hundred thirty thousand, five hundred forty-five".