12320145646 has 4 divisors (see below), whose sum is σ = 18480218472. Its totient is φ = 6160072822.

The previous prime is 12320145641. The next prime is 12320145647. The reversal of 12320145646 is 64654102321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320145641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080036410 + ... + 3080036413.

It is an arithmetic number, because the mean of its divisors is an integer number (4620054618).

Almost surely, 2^12320145646 is an apocalyptic number.

12320145646 is a deficient number, since it is larger than the sum of its proper divisors (6160072826).

12320145646 is an equidigital number, since it uses as much as digits as its factorization.

12320145646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160072825.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 12320145646 its reverse (64654102321), we get a palindrome (76974247967).

The spelling of 12320145646 in words is "twelve billion, three hundred twenty million, one hundred forty-five thousand, six hundred forty-six".