138558398486 has 4 divisors (see below), whose sum is σ = 207837597732. Its totient is φ = 69279199242.

The previous prime is 138558398479. The next prime is 138558398507. The reversal of 138558398486 is 684893855831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34639599620 + ... + 34639599623.

It is an arithmetic number, because the mean of its divisors is an integer number (51959399433).

Almost surely, 2^138558398486 is an apocalyptic number.

138558398486 is a deficient number, since it is larger than the sum of its proper divisors (69279199246).

138558398486 is an equidigital number, since it uses as much as digits as its factorization.

138558398486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69279199245.

The product of its digits is 199065600, while the sum is 68.

The spelling of 138558398486 in words is "one hundred thirty-eight billion, five hundred fifty-eight million, three hundred ninety-eight thousand, four hundred eighty-six".