139889946721 has 16 divisors (see below), whose sum is σ = 162907905024. Its totient is φ = 117630886464.

The previous prime is 139889946709. The next prime is 139889946767. The reversal of 139889946721 is 127649988931.

It is a happy number.

It is not a de Polignac number, because 139889946721 - 2⁵ = 139889946689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139889944721) 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 15 ways as a sum of consecutive naturals, for example, 5769195 + ... + 5793391.

It is an arithmetic number, because the mean of its divisors is an integer number (10181744064).

Almost surely, 2^139889946721 is an apocalyptic number.

It is an amenable number.

139889946721 is a deficient number, since it is larger than the sum of its proper divisors (23017958303).

139889946721 is a wasteful number, since it uses less digits than its factorization.

139889946721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39840.

The product of its digits is 47029248, while the sum is 67.

The spelling of 139889946721 in words is "one hundred thirty-nine billion, eight hundred eighty-nine million, nine hundred forty-six thousand, seven hundred twenty-one".