838139581442 has 8 divisors (see below), whose sum is σ = 1257355908732. Its totient is φ = 419020945200.

The previous prime is 838139581429. The next prime is 838139581453. The reversal of 838139581442 is 244185931838.

It can be written as a sum of positive squares in 2 ways, for example, as 565562657521 + 272576923921 = 752039^2 + 522089^2 .

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, 24401309 + ... + 24435632.

Almost surely, 2^838139581442 is an apocalyptic number.

838139581442 is a deficient number, since it is larger than the sum of its proper divisors (419216327290).

838139581442 is a wasteful number, since it uses less digits than its factorization.

838139581442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48845524.

The product of its digits is 6635520, while the sum is 56.

The spelling of 838139581442 in words is "eight hundred thirty-eight billion, one hundred thirty-nine million, five hundred eighty-one thousand, four hundred forty-two".