193985672861 has 16 divisors (see below), whose sum is σ = 207778406400. Its totient is φ = 180468207360.

The previous prime is 193985672849. The next prime is 193985672863. The reversal of 193985672861 is 168276589391.

It is a cyclic number.

It is not a de Polignac number, because 193985672861 - 2¹⁴ = 193985656477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193985672863) 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, 419315 + ... + 750863.

It is an arithmetic number, because the mean of its divisors is an integer number (12986150400).

Almost surely, 2^193985672861 is an apocalyptic number.

It is an amenable number.

193985672861 is a deficient number, since it is larger than the sum of its proper divisors (13792733539).

193985672861 is a wasteful number, since it uses less digits than its factorization.

193985672861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331964.

The product of its digits is 39191040, while the sum is 65.

The spelling of 193985672861 in words is "one hundred ninety-three billion, nine hundred eighty-five million, six hundred seventy-two thousand, eight hundred sixty-one".