139668439814 has 4 divisors (see below), whose sum is σ = 209502659724. Its totient is φ = 69834219906.

The previous prime is 139668439811. The next prime is 139668439847. The reversal of 139668439814 is 418934866931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139668439811) by changing a digit.

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, 34917109952 + ... + 34917109955.

It is an arithmetic number, because the mean of its divisors is an integer number (52375664931).

Almost surely, 2^139668439814 is an apocalyptic number.

139668439814 is a deficient number, since it is larger than the sum of its proper divisors (69834219910).

139668439814 is an equidigital number, since it uses as much as digits as its factorization.

139668439814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69834219909.

The product of its digits is 26873856, while the sum is 62.

The spelling of 139668439814 in words is "one hundred thirty-nine billion, six hundred sixty-eight million, four hundred thirty-nine thousand, eight hundred fourteen".