139643221765 has 16 divisors (see below), whose sum is σ = 169648105536. Its totient is φ = 110331328000.

The previous prime is 139643221763. The next prime is 139643221793. The reversal of 139643221765 is 567122346931.

It is not a de Polignac number, because 139643221765 - 2¹ = 139643221763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139643221763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206690 + ... + 1317340.

It is an arithmetic number, because the mean of its divisors is an integer number (10603006596).

Almost surely, 2^139643221765 is an apocalyptic number.

It is an amenable number.

139643221765 is a deficient number, since it is larger than the sum of its proper divisors (30004883771).

139643221765 is a wasteful number, since it uses less digits than its factorization.

139643221765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113780.

The product of its digits is 1632960, while the sum is 49.

The spelling of 139643221765 in words is "one hundred thirty-nine billion, six hundred forty-three million, two hundred twenty-one thousand, seven hundred sixty-five".