12645747522 has 12 divisors (see below), whose sum is σ = 27399119670. Its totient is φ = 4215249168.

The previous prime is 12645747503. The next prime is 12645747529. The reversal of 12645747522 is 22574754621.

12645747522 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 574 + 75 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12383015841 + 262731681 = 111279^2 + 16209^2 .

It is not an unprimeable number, because it can be changed into a prime (12645747529) 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 5 ways as a sum of consecutive naturals, for example, 351270747 + ... + 351270782.

Almost surely, 2^12645747522 is an apocalyptic number.

12645747522 is an abundant number, since it is smaller than the sum of its proper divisors (14753372148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12645747522 is a wasteful number, since it uses less digits than its factorization.

12645747522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702541537 (or 702541534 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The spelling of 12645747522 in words is "twelve billion, six hundred forty-five million, seven hundred forty-seven thousand, five hundred twenty-two".