12065654523 has 32 divisors (see below), whose sum is σ = 17481784320. Its totient is φ = 7358008320.

The previous prime is 12065654519. The next prime is 12065654533. The reversal of 12065654523 is 32545656021.

It is not a de Polignac number, because 12065654523 - 2² = 12065654519 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12065654533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5307115 + ... + 5309387.

It is an arithmetic number, because the mean of its divisors is an integer number (546305760).

Almost surely, 2^12065654523 is an apocalyptic number.

12065654523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12065654523 is a deficient number, since it is larger than the sum of its proper divisors (5416129797).

12065654523 is a wasteful number, since it uses less digits than its factorization.

12065654523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 12065654523 in words is "twelve billion, sixty-five million, six hundred fifty-four thousand, five hundred twenty-three".