12151151545 has 24 divisors (see below), whose sum is σ = 15857329176. Its totient is φ = 8934501888.

The previous prime is 12151151503. The next prime is 12151151549. The reversal of 12151151545 is 54515115121.

It can be written as a sum of positive squares in 12 ways, for example, as 10933630096 + 1217521449 = 104564^2 + 34893^2 .

It is not a de Polignac number, because 12151151545 - 2¹¹ = 12151149497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12151151549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166027 + ... + 227743.

It is an arithmetic number, because the mean of its divisors is an integer number (660722049).

Almost surely, 2^12151151545 is an apocalyptic number.

It is an amenable number.

12151151545 is a deficient number, since it is larger than the sum of its proper divisors (3706177631).

12151151545 is a wasteful number, since it uses less digits than its factorization.

12151151545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61981 (or 61968 counting only the distinct ones).

The product of its digits is 5000, while the sum is 31.

Adding to 12151151545 its reverse (54515115121), we get a palindrome (66666266666).

It can be divided in two parts, 121511 and 51545, that added together give a square (173056 = 416²).

The spelling of 12151151545 in words is "twelve billion, one hundred fifty-one million, one hundred fifty-one thousand, five hundred forty-five".