139781239842 has 8 divisors (see below), whose sum is σ = 279562479696. Its totient is φ = 46593746612.

The previous prime is 139781239817. The next prime is 139781239861. The reversal of 139781239842 is 248932187931.

It is a happy number.

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

139781239842 is an admirable number.

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, 11648436648 + ... + 11648436659.

It is an arithmetic number, because the mean of its divisors is an integer number (34945309962).

Almost surely, 2^139781239842 is an apocalyptic number.

139781239842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139781239842 is a wasteful number, since it uses less digits than its factorization.

139781239842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23296873312.

The product of its digits is 5225472, while the sum is 57.

The spelling of 139781239842 in words is "one hundred thirty-nine billion, seven hundred eighty-one million, two hundred thirty-nine thousand, eight hundred forty-two".