12165671501 has 4 divisors (see below), whose sum is σ = 12168874272. Its totient is φ = 12162468732.

The previous prime is 12165671491. The next prime is 12165671513. The reversal of 12165671501 is 10517656121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12165671501 - 2¹⁰ = 12165670477 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 (12165671591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595681 + ... + 1603286.

It is an arithmetic number, because the mean of its divisors is an integer number (3042218568).

Almost surely, 2^12165671501 is an apocalyptic number.

It is an amenable number.

12165671501 is a deficient number, since it is larger than the sum of its proper divisors (3202771).

12165671501 is an equidigital number, since it uses as much as digits as its factorization.

12165671501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202770.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 12165671501 in words is "twelve billion, one hundred sixty-five million, six hundred seventy-one thousand, five hundred one".