12173634091 has 16 divisors (see below), whose sum is σ = 13056798240. Its totient is φ = 11309977600.

The previous prime is 12173634073. The next prime is 12173634101. The reversal of 12173634091 is 19043637121.

It is not a de Polignac number, because 12173634091 - 2²³ = 12165245483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12173634091.

It is not an unprimeable number, because it can be changed into a prime (12173634041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402291 + ... + 431491.

It is an arithmetic number, because the mean of its divisors is an integer number (816049890).

Almost surely, 2^12173634091 is an apocalyptic number.

12173634091 is a deficient number, since it is larger than the sum of its proper divisors (883164149).

12173634091 is a wasteful number, since it uses less digits than its factorization.

12173634091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29534.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 12173634091 in words is "twelve billion, one hundred seventy-three million, six hundred thirty-four thousand, ninety-one".