138697859670618 has 16 divisors (see below), whose sum is σ = 277730334211680. Its totient is φ = 46176850745136.

The previous prime is 138697859670613. The next prime is 138697859670619. The reversal of 138697859670618 is 816076958796831.

It is not an unprimeable number, because it can be changed into a prime (138697859670613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13942280880 + ... + 13942290827.

It is an arithmetic number, because the mean of its divisors is an integer number (17358145888230).

Almost surely, 2^{138697859670618} is an apocalyptic number.

138697859670618 is an abundant number, since it is smaller than the sum of its proper divisors (139032474541062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138697859670618 is a wasteful number, since it uses less digits than its factorization.

138697859670618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27884572541.

The product of its (nonzero) digits is 6584094720, while the sum is 84.

The spelling of 138697859670618 in words is "one hundred thirty-eight trillion, six hundred ninety-seven billion, eight hundred fifty-nine million, six hundred seventy thousand, six hundred eighteen".