138670497386 has 8 divisors (see below), whose sum is σ = 208390231524. Its totient is φ = 69207086880.

The previous prime is 138670497349. The next prime is 138670497391. The reversal of 138670497386 is 683794076831.

138670497386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131138861161 + 7531636225 = 362131^2 + 86785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64079555 + ... + 64081718.

Almost surely, 2^138670497386 is an apocalyptic number.

138670497386 is a deficient number, since it is larger than the sum of its proper divisors (69719734138).

138670497386 is a wasteful number, since it uses less digits than its factorization.

138670497386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128161816.

The product of its (nonzero) digits is 36578304, while the sum is 62.

It can be divided in two parts, 138670 and 497386, that added together give a cube (636056 = 86³).

The spelling of 138670497386 in words is "one hundred thirty-eight billion, six hundred seventy million, four hundred ninety-seven thousand, three hundred eighty-six".