12546320445 has 40 divisors (see below), whose sum is σ = 23674163040. Its totient is φ = 6339189600.

The previous prime is 12546320329. The next prime is 12546320471. The reversal of 12546320445 is 54402364521.

12546320445 is a `hidden beast` number, since 12 + 5 + 4 + 632 + 0 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 12546320445 - 2⁷ = 12546320317 is a prime.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 807531 + ... + 822920.

It is an arithmetic number, because the mean of its divisors is an integer number (591854076).

Almost surely, 2^12546320445 is an apocalyptic number.

12546320445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12546320445 is a deficient number, since it is larger than the sum of its proper divisors (11127842595).

12546320445 is a wasteful number, since it uses less digits than its factorization.

12546320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630487 (or 1630478 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 12546320445 its reverse (54402364521), we get a palindrome (66948684966).

The spelling of 12546320445 in words is "twelve billion, five hundred forty-six million, three hundred twenty thousand, four hundred forty-five".