139439966784 has 28 divisors (see below), whose sum is σ = 368934912624. Its totient is φ = 46479988864.

The previous prime is 139439966777. The next prime is 139439966789. The reversal of 139439966784 is 487669934931.

It is not an unprimeable number, because it can be changed into a prime (139439966789) 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 in 3 ways as a sum of consecutive naturals, for example, 363124722 + ... + 363125105.

Almost surely, 2^139439966784 is an apocalyptic number.

It is an amenable number.

139439966784 is an abundant number, since it is smaller than the sum of its proper divisors (229494945840).

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

139439966784 is an equidigital number, since it uses as much as digits as its factorization.

139439966784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726249842 (or 726249832 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 69.

The spelling of 139439966784 in words is "one hundred thirty-nine billion, four hundred thirty-nine million, nine hundred sixty-six thousand, seven hundred eighty-four".