12165283651 has 4 divisors (see below), whose sum is σ = 12246930000. Its totient is φ = 12083637304.

The previous prime is 12165283591. The next prime is 12165283679. The reversal of 12165283651 is 15638256121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15638256121 = 41 ⋅381420881.

It is a cyclic number.

It is not a de Polignac number, because 12165283651 - 2²⁵ = 12131729219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165283751) 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, 40822951 + ... + 40823248.

It is an arithmetic number, because the mean of its divisors is an integer number (3061732500).

Almost surely, 2^12165283651 is an apocalyptic number.

12165283651 is a deficient number, since it is larger than the sum of its proper divisors (81646349).

12165283651 is an equidigital number, since it uses as much as digits as its factorization.

12165283651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81646348.

The product of its digits is 86400, while the sum is 40.

The spelling of 12165283651 in words is "twelve billion, one hundred sixty-five million, two hundred eighty-three thousand, six hundred fifty-one".