138213658479 has 36 divisors (see below), whose sum is σ = 202081668936. Its totient is φ = 83530089216.

The previous prime is 138213658459. The next prime is 138213658487. The reversal of 138213658479 is 974856312831.

138213658479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138213658479 - 2¹⁶ = 138213592943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138213658459) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 136980327 + ... + 136981335.

Almost surely, 2^138213658479 is an apocalyptic number.

138213658479 is a deficient number, since it is larger than the sum of its proper divisors (63868010457).

138213658479 is an frugal number, since it uses more digits than its factorization.

138213658479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 1084 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The spelling of 138213658479 in words is "one hundred thirty-eight billion, two hundred thirteen million, six hundred fifty-eight thousand, four hundred seventy-nine".