12151443646 has 4 divisors (see below), whose sum is σ = 18227165472. Its totient is φ = 6075721822.

The previous prime is 12151443641. The next prime is 12151443649. The reversal of 12151443646 is 64634415121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64634415121 = 67 ⋅964692763.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151443641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3037860910 + ... + 3037860913.

It is an arithmetic number, because the mean of its divisors is an integer number (4556791368).

Almost surely, 2^12151443646 is an apocalyptic number.

12151443646 is a deficient number, since it is larger than the sum of its proper divisors (6075721826).

12151443646 is an equidigital number, since it uses as much as digits as its factorization.

12151443646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075721825.

The product of its digits is 69120, while the sum is 37.

Adding to 12151443646 its reverse (64634415121), we get a palindrome (76785858767).

The spelling of 12151443646 in words is "twelve billion, one hundred fifty-one million, four hundred forty-three thousand, six hundred forty-six".