12173563391 has 8 divisors (see below), whose sum is σ = 13281062400. Its totient is φ = 11066199640.

The previous prime is 12173563373. The next prime is 12173563403. The reversal of 12173563391 is 19336537121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12173563391 - 2²⁶ = 12106454527 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 (12173563301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285650 + ... + 325488.

It is an arithmetic number, because the mean of its divisors is an integer number (1660132800).

Almost surely, 2^12173563391 is an apocalyptic number.

12173563391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12173563391 is a deficient number, since it is larger than the sum of its proper divisors (1107499009).

12173563391 is a wasteful number, since it uses less digits than its factorization.

12173563391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67629.

The product of its digits is 102060, while the sum is 41.

The spelling of 12173563391 in words is "twelve billion, one hundred seventy-three million, five hundred sixty-three thousand, three hundred ninety-one".