27636541867545 has 64 divisors (see below), whose sum is σ = 50423088570624. Its totient is φ = 12804832051200.

The previous prime is 27636541867537. The next prime is 27636541867549. The reversal of 27636541867545 is 54576814563672.

It is a happy number.

It is not a de Polignac number, because 27636541867545 - 2³ = 27636541867537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27636541867545.

It is not an unprimeable number, because it can be changed into a prime (27636541867549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89327370 + ... + 89636220.

It is an arithmetic number, because the mean of its divisors is an integer number (787860758916).

Almost surely, 2^{27636541867545} is an apocalyptic number.

It is an amenable number.

27636541867545 is a deficient number, since it is larger than the sum of its proper divisors (22786546703079).

27636541867545 is a wasteful number, since it uses less digits than its factorization.

27636541867545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335882.

The product of its digits is 1016064000, while the sum is 69.

The spelling of 27636541867545 in words is "twenty-seven trillion, six hundred thirty-six billion, five hundred forty-one million, eight hundred sixty-seven thousand, five hundred forty-five".