12546355645 has 4 divisors (see below), whose sum is σ = 15055626780. Its totient is φ = 10037084512.

The previous prime is 12546355597. The next prime is 12546355663. The reversal of 12546355645 is 54655364521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8116388281 + 4429967364 = 90091^2 + 66558^2 .

It is a cyclic number.

It is not a de Polignac number, because 12546355645 - 2¹⁹ = 12545831357 is a prime.

It is a super-4 number, since 4×12546355645⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12546355595 and 12546355604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254635560 + ... + 1254635569.

It is an arithmetic number, because the mean of its divisors is an integer number (3763906695).

Almost surely, 2^12546355645 is an apocalyptic number.

It is an amenable number.

12546355645 is a deficient number, since it is larger than the sum of its proper divisors (2509271135).

12546355645 is an equidigital number, since it uses as much as digits as its factorization.

12546355645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509271134.

The product of its digits is 2160000, while the sum is 46.

The spelling of 12546355645 in words is "twelve billion, five hundred forty-six million, three hundred fifty-five thousand, six hundred forty-five".