12540450305 has 16 divisors (see below), whose sum is σ = 15556852224. Its totient is φ = 9694439040.

The previous prime is 12540450301. The next prime is 12540450317. The reversal of 12540450305 is 50305404521.

It is not a de Polignac number, because 12540450305 - 2² = 12540450301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12540450301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46637 + ... + 165093.

It is an arithmetic number, because the mean of its divisors is an integer number (972303264).

Almost surely, 2^12540450305 is an apocalyptic number.

It is an amenable number.

12540450305 is a deficient number, since it is larger than the sum of its proper divisors (3016401919).

12540450305 is a wasteful number, since it uses less digits than its factorization.

12540450305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119176.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 12540450305 its reverse (50305404521), we get a palindrome (62845854826).

The spelling of 12540450305 in words is "twelve billion, five hundred forty million, four hundred fifty thousand, three hundred five".