138814197842 has 8 divisors (see below), whose sum is σ = 211073643516. Its totient is φ = 68456316672.

The previous prime is 138814197827. The next prime is 138814197871. The reversal of 138814197842 is 248791418831.

It can be written as a sum of positive squares in 2 ways, for example, as 125924909881 + 12889287961 = 354859^2 + 113531^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475390943 + ... + 475391234.

Almost surely, 2^138814197842 is an apocalyptic number.

138814197842 is a deficient number, since it is larger than the sum of its proper divisors (72259445674).

138814197842 is an equidigital number, since it uses as much as digits as its factorization.

138814197842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950782252.

The product of its digits is 3096576, while the sum is 56.

The spelling of 138814197842 in words is "one hundred thirty-eight billion, eight hundred fourteen million, one hundred ninety-seven thousand, eight hundred forty-two".