197644919339 has 16 divisors (see below), whose sum is σ = 231301754112. Its totient is φ = 165349302048.

The previous prime is 197644919327. The next prime is 197644919341. The reversal of 197644919339 is 933919446791.

It is not a de Polignac number, because 197644919339 - 2¹² = 197644915243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197644919539) 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, 174152 + ... + 652394.

It is an arithmetic number, because the mean of its divisors is an integer number (14456359632).

Almost surely, 2^197644919339 is an apocalyptic number.

197644919339 is a deficient number, since it is larger than the sum of its proper divisors (33656834773).

197644919339 is a wasteful number, since it uses less digits than its factorization.

197644919339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479666.

The product of its digits is 39680928, while the sum is 65.

The spelling of 197644919339 in words is "one hundred ninety-seven billion, six hundred forty-four million, nine hundred nineteen thousand, three hundred thirty-nine".