138220613248 has 16 divisors (see below), whose sum is σ = 275361378210. Its totient is φ = 69110306560.

The previous prime is 138220613243. The next prime is 138220613249. The reversal of 138220613248 is 842316022831.

It can be written as a sum of positive squares in only one way, i.e., 135830576704 + 2390036544 = 368552^2 + 48888^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 138220613248.

It is not an unprimeable number, because it can be changed into a prime (138220613243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539924143 + ... + 539924398.

Almost surely, 2^138220613248 is an apocalyptic number.

It is an amenable number.

138220613248 is a deficient number, since it is larger than the sum of its proper divisors (137140764962).

138220613248 is an equidigital number, since it uses as much as digits as its factorization.

138220613248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079848555 (or 1079848543 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 138220613248 in words is "one hundred thirty-eight billion, two hundred twenty million, six hundred thirteen thousand, two hundred forty-eight".