12145505054515 has 16 divisors (see below), whose sum is σ = 17636498096832. Its totient is φ = 7838443597824.

The previous prime is 12145505054513. The next prime is 12145505054521. The reversal of 12145505054515 is 51545050554121.

It is not a de Polignac number, because 12145505054515 - 2¹ = 12145505054513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145505054513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10206306174 + ... + 10206307363.

It is an arithmetic number, because the mean of its divisors is an integer number (1102281131052).

Almost surely, 2^{12145505054515} is an apocalyptic number.

12145505054515 is a deficient number, since it is larger than the sum of its proper divisors (5490993042317).

12145505054515 is a wasteful number, since it uses less digits than its factorization.

12145505054515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20412613566.

The product of its (nonzero) digits is 500000, while the sum is 43.

The spelling of 12145505054515 in words is "twelve trillion, one hundred forty-five billion, five hundred five million, fifty-four thousand, five hundred fifteen".